THIS WARRANT AND THE SHARES OF COMMON STOCK  ISSUABLE  HEREUNDER  HAVE
     NOT BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR ANY
     APPLICABLE  STATE  SECURITIES  LAWS  AND  MAY  NOT  BE  TRANSFERRED  UNLESS
     REGISTERED  UNDER SAID ACT AND ANY APPLICABLE  STATE  SECURITIES LAWS OR IN
     THE OPINION OF COUNSEL SATISFACTORY TO THE COMPANY PURSUANT TO AN EXEMPTION
     FROM SUCH REGISTRATION REQUIREMENTS.

                             STOCK PURCHASE WARRANT
                             ----------------------
 
Company:                               Mobile Mini, Inc., a Delaware corporation

Number of Shares:                      50,000

Class of Stock:                        Common Stock

Initial Exercise Price:        $5.00 per share

Issued as of:                          July 31, 1997

Expiration Date:                       As described in Section 1

     FOR  VALUE  RECEIVED,   the  adequacy  and  receipt  of  which  are  hereby
acknowledged,  MOBIL MINI, INC., a Delaware  corporation,  hereby certifies that
ARIZONA LAND INCOME CORPORATION, an Arizona corporation,  and its successors and
assigns,  are entitled to purchase from the Company at any time and from time to
time on and after the date that is 180 days  subsequent to the date hereof until
5:00 p.m. Arizona local time on the Expiration Date at an initial Exercise Price
(as described in Section 1), fully paid and nonassessable shares of Common Stock
of the Company, on the terms and conditions hereinafter set forth. The number of
such shares of Common Stock and the Exercise  Price are subject to adjustment as
provided in the Warrant.

     1. Certain  Definitions.  As used in this Warrant, the following terms have
the following definitions:

          "Additional  Shares of Common  Stock" means all shares of Common Stock
issued or  issuable by the Company  after the date of this  Warrant,  other than
shares of Common Stock issuable (a) upon the exercise of warrants issued or sold
in connection  with the Company's  1994 initial  public  offering,  (b) upon the
exercise of options  issued  pursuant to the  Company's  stock  option  plans in
effect from time to time so long as the exercise price is not less than the Fair
Value of the Common Stock on the date such options are granted, and (c) pursuant
to the

exercise of  warrants  issued in  connection  with a  Financing  Transaction  as
described in Section 1(b) of the Note.

          "Common Stock" means the Company's  Common Stock,  par value $0.01 per
share,  and  includes  any common  stock of the  Company of any class or classes
resulting from any  reclassification or  reclassifications  thereof which is not
limited  to a fixed sum or  percentage  of par value in respect of the rights of
the holders  thereof to  participate  in dividends  and in the  distribution  of
assets upon the voluntary or involuntary liquidation,  dissolution or winding up
of the Company.

          "Company" means MOBILE MINI, INC., a Delaware corporation.

          "Convertible  Securities"  means evidence of  indebtedness,  shares of
stock  or  other  securities  which  are  at any  time  directly  or  indirectly
convertible into or exchangeable for Additional Shares of Common Stock.

          "Current  Market  Price"  of a share of  Common  Stock or of any other
security as of a relevant  date means:  (i) the Fair Value thereof as determined
in accordance  with clause (ii) of the  definition of Fair Value with respect to
Common Stock or any other  security that is not listed on a national  securities
exchange or traded on the over-the-counter  market or quoted on NASDAQ, and (ii)
the closing  price on such date  (excluding  any trades  which are not bona fide
arm's length  transactions)  with respect to Common Stock or any other  security
that  is  listed  on  a   national   securities   exchange   or  traded  on  the
over-the-counter  market or quoted on  NASDAQ.  The  closing  price for each day
shall be (i) the last  sale  price  of  shares  of  Common  Stock or such  other
security on such date or, if no such sale takes place on such date,  the average
of the  closing  bid and asked  prices  thereof  on such  date,  in each case as
officially  reported on the principal national  securities exchange on which the
same are then  listed or  admitted  to  trading,  or (ii) if no shares of Common
Stock or if no  securities  of the same  class as such other  security  are then
listed or admitted to trading on any national securities  exchange,  the average
of the  reported  closing  bid and  asked  prices  thereof  on such  date in the
over-the-counter  market  as shown by the  National  Association  of  Securities
Dealers  automated  quotation  system or, if no shares of Common  Stock or if no
securities  of the same class as such  other  security  are then  quoted in such
system,  as published  by the National  Quotation  Bureau,  Incorporated  or any
similar  successor  organization,  and in either  case as reported by any member
firm of the New York Stock Exchange selected by the Warrantholders.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended.

          "Exercise  Period" means the period commencing on the date that is 180
days subsequent to the date hereof and ending at 5:00 p.m. Arizona local time on
the Expiration Date.

          "Exercise  Price"  means  initially  Five  Dollars  ($5.00) per share,
subject to adjustment as provided in this Warrant.
                                        2

          "Expiration Date" means the date that is five (5) years after the date
hereof.

          "Fair Value" means: (i) with respect to a share of Common Stock or any
other security,  the Current Market Price thereof,  and (ii) with respect to any
other property,  assets,  business or entity, an amount determined in good faith
by the board of Directors of the Company.

          "Indemnified  Party" and  "Indemnifying  Party" have the  meanings set
forth in Section 11(e)(iii).

          "Lender"   means   ARIZONA   LAND  INCOME   CORPORATION,   an  Arizona
corporation, and its successors and assigns.

          "Note" means that certain Senior  Subordinated  Promissory  Note dated
July 31,  1997 by the  Company  in favor of the Lender  (as  amended,  restated,
supplemented or otherwise modified from time to time).

          "Registrable  Stock" means:  (i) all Warrant Shares which are issuable
to the Warrantholders pursuant to the Warrants, whether or not the Warrants have
in fact been  exercised and whether or not such Warrant Shares have in fact been
issued,  (ii) all Warrant Shares acquired by the Warrantholders  pursuant to the
Warrants,  and (iii) any shares of Common  Stock,  whether or not such shares of
Common Stock have in fact been  issued,  and stocks or other  securities  of the
Company issued upon conversion of, in a stock split or reclassification of, or a
stock dividend or other  distribution on, or in substitution or exchange for, or
otherwise  in  connection   with,   such  Warrant  Shares  or  in  a  merger  or
consolidation involving the Company or its assets;  provided,  however, that the
foregoing  securities  shall not be  considered  Registrable  Stock if they were
previously   registered  pursuant  to  Section  11  hereunder  or  if  they  are
transferable without  registration  pursuant to Rule 144(k) under the Securities
Act. For purposes of Section 11, a  Warrantholder  of record shall be treated as
the record holder of the related  Warrant Shares and other  securities  issuable
pursuant to the Warrants.

          "SEC" means the Securities and Exchange Commission.

          "Securities Act" means the Securities Act of 1933, as amended.

          "Warrant(s)" means this Warrant and any warrants issued in exchange or
replacement of this Warrant or upon transfer hereof.

          "Warrantholder(s)" means Lender and its successors and assigns.

          "Warrant   Shares"   means   shares  of  Common   Stock   issuable  to
Warrantholders pursuant to the Warrants.
                                        3

     2.   Exercise of Warrant.

          (a) Method of Exercise.  This Warrant may be exercised, in whole or in
part,  at any time and from time to time during the  Exercise  Period by written
notice to the Company  (accompanied  by physical  surrender of this Warrant) and
upon  payment to the Company of the Exercise  Price  (subject to  adjustment  as
provided  herein) for the shares of Common Stock in respect of which the Warrant
is exercised.

          (b) Mandatory Exercise. Commencing two (2) years following the date of
issuance of this Warrant,  if the closing  price of the  Company's  common stock
(excluding  any trades that are not bona fide arm's length  transactions)  shall
thereafter  exceed  $8.75 per share (as  adjusted  to reflect  any stock  split,
reverse stock split,  stock dividend or other changes in the  capitalization  of
the Company from time to time and  excluding  any trades which are not bona fide
arm's  length  transactions)  during each  trading day of any period of not less
than twenty (20) consecutive trading days (a "Measurement  Period"), the Company
shall have the option of requiring the  Warrantholders  to exercise this Warrant
in whole  or, at the  Company's  election,  in part.  If the  Company  elects to
require  the  Warrantholders  to so exercise  this  Warrant,  the Company  shall
provide the  Warrantholders  with written notice thereof within five (5) trading
days   following  the  end  of  the  relevant   Measurement   Period,   and  the
Warrantholders  thereafter shall, in accordance with the terms hereof,  exercise
this Warrant or portion  thereof as to which such notice  relates  within ninety
(90) days following receipt of such notice.

     3. Form of Payout  of  Exercise  Price.  Anything  contained  herein to the
contrary  notwithstanding,  at the option of the  Warrantholders,  the  Exercise
Price may be paid in any one or a  combination  of the following  forms:  (a) by
wire  transfer to the  Company,  (b) by a certified  or  cashier's  check to the
Company,  (c) by the cancellation of any indebtedness owed by the Company and/or
any  subsidiaries  of  the  Company  to  the  Warrantholder,  and/or  (d) by the
surrender to the Company of this Warrant,  Warrant Shares, and/or the Note (or a
portion  thereof),  valued at par,  having a Fair  Value  equal to the  Exercise
Price.

     4. Cashless  Exercise.  In lieu of exercising  this Warrant as specified in
Sections  2 and 3  above,  the  Warrantholders  may  from  time  to  time at the
Warrantholders'  option convert this Warrant, in whole or in part, into a number
of  shares  of  Common  Stock of the  Company  determined  by  dividing  (A) the
aggregate Fair Value of such shares or other securities  otherwise issuable upon
exercise of this Warrant  minus the aggregate  Exercise  Price of such shares by
(B) the Fair Value of one such share.

     5.  Certificates for Warrant Shares;  New Warrant.  The Company agrees that
the Warrant Shares shall be deemed to have been issued to the  Warrantholders as
the record owners of such Warrant Shares as of the close of business on the date
on which payment for such Warrant  Shares has been made (or deemed to be made by
cashless  exercise) in accordance  with the terms of this Warrant.  Certificates
for the Warrant Shares shall be delivered to
                                        4

Warrantholders within a reasonable time, not exceeding ten (10) days, after this
Warrant has been exercised.  A new Warrant representing the number of shares, if
any, with respect to which this Warrant remains exercisable also shall be issued
to the  Warrantholders  within  such  time  so long as  this  Warrant  has  been
surrendered to the Company at the time of exercise.

     6. Adjustment of Exercise Price,  Number of Shares and Nature of Securities
        Issuable Upon Exercise of Warrants.

          (a) Exercise Price; Adjustment of Number of Shares. The Exercise Price
shall be subject to adjustment from time to time as hereinafter  provided.  Upon
each adjustment of the Exercise Price,  the  Warrantholders  shall thereafter be
entitled to purchase,  at the Exercise Price resulting from such  adjustment,  a
number  of  shares  determined  by  multiplying  the  Exercise  Price in  effect
immediately  prior  to such  adjustment  by the  number  of  shares  purchasable
pursuant  hereto  immediately  prior to such adjustment and dividing the product
thereof by the Exercise Price resulting from such adjustment.

          (b) Adjustment of Exercise Price Upon Issuance of Common Stock. In the
event that the Company shall at any time issue or sell any Additional  Shares of
Common Stock or Convertible Securities, or declare any dividend or authorize any
other  distribution upon any class of stock of the Company payable in Additional
Shares of Common Stock or Convertible Securities,  and the Company shall receive
consideration in respect of such issuance,  sale, dividend or distribution in an
amount  less  than the Fair  Value of the  securities  so  issued or sold or the
securities with respect to which such dividend or distribution relates, then, in
each  such  event,  the  Exercise  Price  in  effect  immediately  prior to such
issuance,  sale,  dividend or  distribution  shall be reduced to a number  which
shall be calculated by dividing (A) an amount equal to the sum of (1) the number
of shares of Common Stock outstanding immediately prior to such issuance,  sale,
dividend or  distribution,  multiplied by the then existing  Exercise Price plus
(2) the  aggregate  consideration,  if any,  received by the  Company  upon such
issuance,  sale, dividend or distribution,  by (B) the total number of shares of
Common Stock  outstanding  immediately  after such issuance,  sale,  dividend or
distribution. In case at any time on or after the date hereof, the Company shall
declare any dividend, or authorize any other distribution, upon any stock of the
Company of any class,  payable in  Additional  Shares of Common  Stock or by the
issuance of Convertible  Securities,  such declaration or distribution  shall be
deemed  to  have  been  issued  or  sold  (as  of  the  record   date)   without
consideration.  For  purposes of this  Section 6, the number of shares of Common
Stock outstanding at any given time shall not include shares owned or held by or
for the account of the Company,  and the disposition of any such shares shall be
considered an issue or sale of Common Stock for the purposes of this Section 6.

          (c) Reorganization,  Reclassification,  Consolidation, Merger or Sale.
If any capital  reorganization or  reclassification  of the capital stock of the
Company,  or any or any  consolidation  or merger of the  Company  with  another
corporation,  or the sale of all or  substantially  all of its assets to another
corporation shall be effected in such a way that holders of
                                        5

Common Stock shall be entitled to receive cash, stock, securities or assets with
respect to or in  exchange  for  Common  Stock,  then,  as a  condition  of such
reorganization,  reclassification,  consolidation,  merger or sale,  lawful  and
adequate  provisions shall be made whereby the  Warrantholders  shall thereafter
have the right to  purchase  and  receive  upon the basis and upon the terms and
conditions  specified in this Warrant upon  exercise of this Warrant and in lieu
of the  shares  of the  Common  Stock  of the  Company  immediately  theretofore
purchasable and receivable upon the exercise of the rights  represented  hereby,
such  cash,  shares of stock,  securities  or assets as may be issued or payable
with  respect to or in  exchange  for a number of  outstanding  shares of Common
Stock equal to the number of shares of such Common Stock immediately theretofore
purchasable and receivable upon the exercise of the rights  represented  hereby,
and in any such case  appropriate  provision  shall be made with  respect to the
rights and interests of the Warrantholders to the end that the provisions hereof
(including, without limitation, provisions for adjustments of the Exercise Price
and of the number of shares purchasable and receivable upon the exercise of this
Warrant) shall thereafter be applicable, as nearly as may be, in relation to any
shares of stock  securities or assets  thereafter  deliverable upon the exercise
hereof.

          (d) Company to Prevent  Dilution.  In case at any time or from time to
time  conditions  arise by reason of action  taken by the Company  which are not
adequately  covered  by the  provisions  of this  Section  6,  and  which  might
materially and adversely effect the exercise rights of the Warrantholders  under
this Warrant,  the Board of Directors of the Company shall, cause an appropriate
adjustment  to the  Exercise  Price and the  number of shares  purchasable  upon
exercise of the  Warrants,  so as to preserve,  without  dilution,  the exercise
rights of the Warrantholders.

          (e) Stock Splits and Reverse  Splits.  In case at any time the Company
shall subdivide its outstanding  shares of Common Stock into a greater number of
shares, the Exercise Price in effect immediately prior to such subdivision shall
be proportionately  reduced and the number of shares of Common Stock purchasable
pursuant  to this  Warrant  immediately  prior  to  such  subdivision  shall  be
proportionately increased, and conversely, in case at any time the Company shall
combine its outstanding  shares of Common Stock into a smaller number of shares,
the Exercise  Price in effect  immediately  prior to such  combination  shall be
proportionately  increased and the number of shares of Common Stock  purchasable
upon the exercise of this Warrant immediately prior to such combination shall be
proportionately reduced.

          (f) Dissolution,  Liquidation and Wind-Up.  In case the Company shall,
at any time prior to the expiration of this Warrant, dissolve, liquidate or wind
up its affairs, the Warrantholders shall be entitled,  upon the exercise of this
Warrant,  to receive, in lieu of the shares of Common Stock of the Company which
such  Warrantholders  would have been  entitled  to  receive,  the same kind and
amount  of  assets  as  would  have  been  issued,  distributed  or paid to such
Warrantholders upon any such dissolution, liquidation or winding up with respect
to such shares of Common Stock of the Company,  had such Warrantholders been the
holders of record of the Warrant  Shares  receivable  upon the  exercise of this
Warrant on the record date for the
                                        6

determination  of  those  persons  entitled  to  receive  any  such  liquidating
distribution. After any such dissolution,  liquidation or winding up which shall
result in any cash  distribution in excess of the Exercise Price provided for by
this  Warrant,  the  Warrantholders  may, at each such  Warrantholder's  option,
exercise the same without making payment of the Exercise Price, and in such case
the Company shall, upon the distribution to said  Warrantholders,  consider that
said Exercise Price has been paid in full to it and in making settlement to said
Warrantholders,  shall deduct from the amount payable to such  Warrantholders an
amount equal to such Exercise Price.

          (g)  Adjustment  Certificate.  In each  case of an  adjustment  in the
number  of  shares  of  Common  Stock or other  stock,  securities  or  property
receivable  on the  exercise  of the  warrants,  the Board of  Directors  of the
Company and the Company's Chief Financial  Officer shall compute such adjustment
in  accordance  with the terms of this  Warrant and prepare and duly execute and
deliver to the  Warrantholders  a certificate  setting forth such adjustment and
showing in detail the facts upon which such adjustment is based.

     7.   Special Agreements of the Company.

          (a) Reservation of Shares.  The Company  covenants and agrees that all
Warrant  Shares  will,  upon  issuance,   be  validly  issued,  fully  paid  and
nonassessable and free from all preemptive  rights of any stockholder,  and from
all taxes,  liens and charges  with  respect to the issue  thereof.  The Company
further  covenants  and agrees  that during the period  within  which the rights
represented by this Warrant may be exercised, the Company will at all times have
authorized,  and  reserved,  a  sufficient  number of shares of Common  Stock to
provide for the exercise of the rights represented by this Warrant.

          (b) Avoidance of Certain  Actions.  The Company will not, by amendment
of its Certificate of Incorporation or through any  reorganization,  transfer of
assets,  consolidation,  merger, issue or sale of securities or otherwise, avoid
or take any action  which would have the effect of avoiding  the  observance  or
performance  of any of the terms to be observed or  performed  hereunder  by the
Company,  but will at all times in good faith  assist in carrying out all of the
provisions of this Warrant and in taking all of such actions as may be necessary
or  appropriate  in order to protect  the rights of the  Warrantholders  against
dilution or other impairment of their rights hereunder.

          (c) Listing on Securities Exchanges; Registration. If, and so long as,
any  class of the  Company's  Common  Stock  shall  be  listed  on any  national
securities  exchange (as defined in the Exchange  Act), the Company will, at its
expense,  obtain and maintain the approval for listing upon  official  notice of
issuance of all Warrant  Shares and maintain the listing of Warrant Shares after
their  issuance;  and the  Company  will so  list  on such  national  securities
exchange,  and will maintain such listing of, any other  securities  that at any
time  are  issuable  upon  exercise  of  this  Warrant  if and at the  time  any
securities  of the  same  class  shall be  listed  on such  national  securities
exchange by the Company.
                                        7

          (d)  Information  Rights.  So long  as the  Warrantholders  hold  this
Warrant  or any  of  the  Warrant  Shares,  the  Company  shall  deliver  to the
Warrantholders  (i) promptly after mailing,  copies of all communications to the
shareholders of the Company,  and (ii) within two (2) business days after filing
with the SEC, all filings made by the Company  under the  Securities  Act or the
Exchange Act.

          (e) Compliance  with Law. The Company shall comply with all applicable
laws,   rules  and   regulations  of  the  United  States  and  of  all  states,
municipalities and agencies of any other jurisdiction  applicable to the Company
and shall do all things necessary to preserve,  renew and keep in full force and
effect and in good standing its corporate  existence and authority  necessary to
continue its business.

     8. Fractional Shares. No fractional shares or scrip representing fractional
shares  shall be issued upon the exercise of this  Warrant.  With respect to any
fraction of a share called for upon  exercise  hereof,  such  fraction  shall be
rounded to the nearest whole share.  A fraction of one-half  shall be rounded up
to the next highest integer.

     9.   Notices   of  Stock   Dividends,   Subscriptions,   Reclassifications,
Consolidations,  Mergers,  etc. If at any time:  (i) the Company shall declare a
cash or stock dividend (or an increase in the then existing  dividend  rate), or
declare a dividend on Common Stock payable otherwise than in cash out of its net
earnings  after  taxes for the prior  fiscal  year,  or (ii) the  Company  shall
authorize the granting to the holders of Common Stock of rights to subscribe for
or purchase any shares of capital stock of any class or of any other rights;  or
(iii)  there  shall  be any  capital  reorganization,  or  reclassification,  or
redemption of the capital stock of the Company,  or  consolidation  or merger of
the Company with, or sale of all or substantially  all of its assets to, another
corporation  or  firm;  or  (iv)  there  shall  be a  voluntary  or  involuntary
dissolution,  liquidation  or winding up of the Company,  then the Company shall
give to the  Warrantholders at the addresses of such  Warrantholders as shown on
the books of the  Company,  at least  twenty  (20) days prior to the  applicable
record date hereinafter  specified,  a written notice summarizing such action or
event and  stating  the record  date for any such  dividend  or rights (or, if a
record  date is not to be  selected,  the date as of which the holders of Common
Stock of record entitled to such dividend or rights are to be  determined),  the
date on which any such reorganization, reclassification,  consolidation, merger,
sale of assets,  dissolution,  liquidation  or winding up is  expected to become
effective,  and the date as of which it is expected  the holders of Common Stock
of record  shall be  entitled to effect any  exchange of their  shares of Common
Stock for cash (or cash  equivalent),  securities or other property  deliverable
upon any such reorganization,  reclassification,  consolidation, merger, sale of
assets, dissolution, liquidation or winding up.

     10.  Registered Holder, Transfer of Warrants or Warrant Shares.

          (a) Maintenance of Registration Books;  Ownership of this Warrant. The
Company shall keep at its principal office a register in which the Company shall
provide for the registration, transfer and exchange of this Warrant. The Company
shall not at any time, except 
                                       8

upon the  dissolution,  liquidation  or  winding-up  of the Company,  close such
register so as to result in  preventing  or delaying the exercise or transfer of
this Warrant.

          (b)  Exchange and  Replacement.  To the extent  permissible  under any
applicable  securities laws, this Warrant is exchangeable  upon surrender hereof
by the registered holder to the Company at its principal office for new Warrants
of like tenor and date  representing  in the aggregate the right to purchase the
number of shares purchasable  hereunder,  each of such new Warrants to represent
the right to  purchase  such  number of  shares as shall be  designated  by said
registered  holder  at the  time of  surrender.  This  Warrant  and  all  rights
hereunder are  transferable in whole or in part upon the books of the Company by
the registered holder hereof in person or by duly authorized  attorney,  and new
Warrants shall be made and delivered by the Company,  of the same tenor and date
as this Warrant but registered in the name of the transferee(s),  upon surrender
of this Warrant,  duly endorsed,  to said office of the Company. Upon receipt by
the  Company  of  evidence  reasonably  satisfactory  to it of the loss,  theft,
destruction or mutilation of this Warrant,  and upon surrender and  cancellation
of this Warrant,  if mutilated,  the Company will make and deliver a new Warrant
of like tenor,  in lieu of this  Warrant,  without  requiring the posting of any
bond or the  giving  of any  other  security.  This  Warrant  shall be  promptly
canceled  by the  Company  upon the  surrender  hereof  in  connection  with any
exchange, transfer or replacement. The Company shall pay all expenses, taxes and
other charges payable in connection with the preparation, execution and delivery
of Warrants pursuant to this Section 10.

          (c) Warrants  and Warrant  Shares Not  Registered.  The holder of this
Warrant,  by accepting  this  Warrant,  represents  and  acknowledges  that this
Warrant and the Warrant Shares are not being registered under the Securities Act
on the grounds  that the  issuance of this  Warrant and the offering and sale of
such  Warrant  Shares are exempt from  registration  under  Section  4(2) of the
Securities Act as not involving any public offering.

     11.  Registration.

          (a) Incidental Registration.  Each time the Company shall determine to
file a registration  statement  under the Securities Act (other than on Form S-8
or Form S-4) in connection  with the proposed offer and sale for money of any of
its equity securities by it or by any of its security holders,  the Company will
give written notice of its  determination  to all holders of Registrable  Stock.
Upon the written request of a holder of any  Registrable  Stock delivered to the
Company  within fifteen (15) days  following the Company's  notice,  the Company
will cause all such  Registrable  Stock,  the holders of which have so requested
registration thereof, to be included in such registration statement,  all to the
extent  requisite  to permit the sale or other  disposition  by the  prospective
seller or sellers of the  Registrable  Stock to be so  registered  in accordance
with the terms of the proposed  offering.  If the  registration  statement is to
cover an  underwritten  distribution,  the Company shall use its best efforts to
cause the  Registrable  Stock  requested for inclusion  pursuant to this Section
11(a) to be included in the underwriting on the same terms and conditions as the
securities otherwise being sold through the underwriters.  If, in 
                                       9

the good faith judgment of the managing underwriter of such public offering, the
inclusion  of all of the  Registrable  Stock  requested to be  registered  would
materially  and adversely  affect the  successful  marketing of the other shares
proposed to be offered,  then the amount of the Registrable Stock to be included
in the offering shall be reduced and the Registrable  Stock and the other shares
to be  offered  (excluding  shares to be  offered  by or for the  account of the
Company) shall participate in such offering as follows: the Registrable Stock to
be included in such offering and the other shares of Common Stock to be included
in such  offering  shall each be reduced pro rata in proportion to the number of
shares of Common Stock  proposed to be included in such  offering by each holder
of such shares.

          (b) Form S-3 Registration. If the Company becomes eligible to use Form
S-3 under the Securities Act or a comparable  successor  form, the Company shall
use its reasonable  efforts to continue to qualify at all times for registration
on Form S-3 or such successor form. The holders of Registrable  Stock shall have
a  one-time  right to request  and have  effected  a  registration  of shares of
Registrable  Stock on Form S-3 or such successor  form for a public  offering of
shares of  Registrable  Stock.  Such request shall be in writing and shall state
the number of shares of  Registrable  Stock to be disposed  of and the  intended
method of disposition.  In addition,  the Company shall not be obligated to file
and effect a registration  statement during the ninety (90) day period following
the  end of its  fiscal  year.  The  Company  may  postpone  the  filing  of the
registration  statement  required hereunder for a reasonable period of time, not
to exceed 90 days  during any  twelve  month  period,  if the  Company  has been
advised by legal  counsel that such filing  would  require the  disclosure  of a
material  transaction or other matter and the Company determines  reasonably and
in good faith that such disclosure  would have a material  adverse effect on the
Company.  The Company shall give notice to all holders of  Registrable  Stock of
the receipt of a request for  registration  pursuant to this  Section  11(b) and
shall provide a reasonable  opportunity  for such holders to  participate in the
registration.

          (c) Registration  Procedures.  If and whenever the Company is required
by the  provisions  of  Section  11(a) or 11(b) to effect  the  registration  of
Registrable Stock under the Securities Act, the Company will, at its expense, as
expeditiously as possible:

                    (i) In accordance  with the Securities Act and the rules and
regulations  of  the  Commission,   prepare  and  file  with  the  Commission  a
registration  statement on the form of registration  statement  appropriate with
respect to such  securities and use its best efforts to cause such  registration
statement to become and remain  effective  until the securities  covered by such
registration  statement  to become and  remain  effective  until the  securities
covered by such registration statement have been sold, and prepare and file with
the Commission such amendments to such registration statement and supplements to
the prospectus  contained  therein as may be necessary to keep such registration
statement effective and such registration  statement and prospectus accurate and
complete until the securities  covered by such registration  statement have been
sold; provided,  however, that in no event shall the Company be required to keep
any such registration  statement effective for a period in excess of twelve (12)
months  (plus the 
                                       10

number  of  days,  if any,  during  such  twelve  (12)  month  period  that  the
Warrantholders shall be restricted from selling shares pursuant to Section 11(e)
hereof);

                    (ii) If the offering is to be  underwritten,  in whole or in
part,  enter  into a written  underwriting  agreement  with the  holders  of the
Registrable Stock participating in such offering and the underwriter in form and
substance  reasonably  satisfactory to the Company,  the managing underwriter of
the public offering and the holders of the Registrable  Stock  participating  in
such offering;

                    (iii) Furnish to the holders of securities  participating in
such  registration  and to the  underwriters of the securities  being registered
such  reasonable  number of copies of the  registration  statement,  preliminary
prospectus,  final prospectus and such other documents as such  underwriters and
holders may  reasonably  request in order to facilitate  the public  offering of
such securities;

                    (iv)  Use its  best  efforts  to  register  to  qualify  the
securities covered by such registration statement under such state securities or
blue  sky  laws  of  such  jurisdictions  as  such  participating   holders  and
underwriters may reasonably request;

                    (v) Notify the holders  participating in such  registration,
promptly after it shall receive notice  thereof,  of the date and time when such
registration  statement  and each  post-effective  amendment  thereto has become
effective or a supplement to any prospectus  forming a part of such registration
statement has been filed;

                    (vi)  Notify  such  holders  promptly  of any request by the
Commission for the amending or supplementing of such  registration  statement or
prospectus or for additional information;

                    (vii)  Prepare and promptly  file with the  Commission,  and
promptly notify such holders of the filing of, such amendments or supplements to
such  registration  statement or  prospectus  as may be necessary to correct any
statements  or  omissions  if, at the time when a  prospectus  relating  to such
securities is required to be delivered  under the Securities  Act, any event has
occurred as the result of which any such  prospectus or any other  prospectus as
then in effect may  include an untrue  statement  of a material  fact or omit to
state any material fact  required to be stated  therein or necessary to make the
statements therein not misleading;

                    (viii) In case any of such  holders or any  underwriter  for
any such  holders  is  required  to  deliver  a  prospectus  at a time  when the
prospectus  then in circulation is not in compliance  with the Securities Act or
the rules and regulations of the Commission,  prepare promptly upon request such
amendments or supplements to such registration  statement and such prospectus as
may be necessary in order for such prospectus to comply with the requirements of
the Securities Act and such rules and regulations;
                                       11

                    (ix) Advise such  holders,  promptly  after it shall receive
notice or obtain  knowledge  thereof,  of the  issuance of any stop order by the
Commission  suspending the effectiveness of such  registration  statement or the
initiation or threatening of any  proceedings  for that purpose and promptly use
its best  efforts to  prevent  the  issuance  of any stop order or to obtain its
withdrawal if such stop order should be issued;

                    (x)  Prepare  a  prospectus   supplement  or  post-effective
amendment  to the  registration  statement  or  the  related  prospectus  or any
document  incorporated therein by reference or file any other required documents
so that, as thereafter delivered to the purchasers of the Registrable Stock, the
prospectus  will not contain an untrue  statement  of  material  fact or omit to
state any material fact necessary to make the statements therein not misleading;
and

                    (xi)  Otherwise  use its best  efforts  to  comply  with all
applicable rules and regulations of the Commission, and make generally available
to the Company's security holders earnings statements  satisfying the provisions
of Section 11(a) of the Securities Act, no later than forty-five (45) days after
the end of any twelve (12) month  period (or ninety (90) days,  if such a period
is a fiscal  year) (i)  commencing  at the end of any  fiscal  quarter  in which
Registrable  Stock is sold to underwriters in an underwritten  offering,  or, if
not sold to  underwriters  in such an offering,  (ii)  beginning  with the first
month of the Company's first fiscal quarter  commencing after the effective date
of a registration statement.

          (d) Expense of  Registration.  All expenses  incident to the Company's
performance of or compliance with this Warrant (excluding discounts, commissions
or fees of underwriters,  selling brokers, dealer managers or similar securities
industry  professionals relating to the distribution of the Registrable Stock or
legal  expenses  of any  person  other than the  Company)  shall be borne by the
Company.  The selling holders shall bear any legal expenses  incurred by them in
connection with any registration pursuant to this Section 11.

          (e) Suspension of Offers and Sales. If, during the  effectiveness of a
registration  statement filed pursuant to this Section 11, an intervening  event
shall have occurred  which, in the opinion of the Company's  counsel,  makes the
prospectus  included in such  registration  statement no longer  comply with the
Securities  Act,  after  notice  from the  Company  containing  such  fact,  the
Warrantholders  shall make no  further  sales or other  dispositions,  or offers
therefor, of securities under such registration statement until it receives from
the Company copies of a new, amended or supplemented  prospectus  complying with
the Securities Act as soon as practicable  after such notice.  The Company shall
keep the Warrantholders fully informed of the status of its efforts, which shall
be prompt and diligent, to cause such new, amended or supplemented prospectus to
be available for use by such Warrantholders.

          (f)  Indemnification.
            
                    (i) The  Company  hereby  agrees  to  indemnify  each of the
holders of Registrable Stock against all claims, losses, damages and liabilities
(or actions in respect  thereof) 
                                       12

arising out of or based on any untrue statement (or alleged untrue statement) of
a material fact contained in any  registration  statement,  preliminary or final
prospectus,  or other document incident to any such registration,  qualification
or compliance (or in any related  registration  statement,  notification  or the
like) or any omission (or alleged  omission)  to state  therein a material  fact
required to be stated  therein or necessary to make the  statements  therein not
misleading,  or  any  violation  by  the  Company  of  any  rule  or  regulation
promulgated  under the  Securities Act applicable to the Company and relating to
action  or  inaction  required  of the  Company  in  connection  with  any  such
registration,  qualification  or  compliance,  and to  reimburse  the holders of
Registrable Stock (including  officers and directors of the same and controlling
persons) for any legal and any other expenses  reasonably incurred in connection
with  investigating  or defending  any such claim,  loss,  damage,  liability or
action;  provided,  however,  the Company will not be liable in any such case to
the extent that any such claim,  loss,  damage or liability  arises out of or is
based on any  untrue  statement  or  omission  based  upon  written  information
furnished to the Company by Warrantholders specifically for use therein.

                    (ii) The  Warrantholders  severally and not jointly agree to
indemnify the Company and its officers and  directors  and each person,  if any,
who controls any thereof  within the meaning of Section 15 of the Securities Act
and  their  respective  successors  against  all  claims,  losses,  damages  and
liabilities (or actions in respect hereof) arising out of or based on any untrue
statement of a material fact contained in any prospectus,  offering  circular or
other  document  incident  to  any  registration,  qualification  or  compliance
relating to  securities  purchased  pursuant to the  Warrants (or in any related
registration  statement,  notification  or the like) or any omission (or alleged
omission)  to state  therein a material  fact  required to be stated  therein or
necessary to make the  statements  therein not misleading and will reimburse the
Company and each other person  indemnified  pursuant to this subsection (ii) for
any  legal  and any  other  expenses  reasonably  incurred  in  connection  with
investigating or defending any such claim,  loss,  damage)  liability or action;
provided,  however,  that this  subsection (ii) shall apply only if (and only to
the extent that) such  statement  or omission was made in reliance  upon written
information  (including,  without  limitation,  written  negative  responses  to
inquiries)  furnished to the Company by  Warrantholders  specifically for use in
such prospectus,  or any such other document (or related registration statement,
notification or the like) or any amendment or supplement thereto.

                    (iii) Each party entitled to indemnification  hereunder (the
"Indemnified  Party")  shall  give  notice  to the  party  required  to  provide
indemnification (the "Indemnifying Party") promptly after such Indemnified Party
has actual knowledge of any claim as to which indemnity may be sought, and shall
permit the Indemnifying  Party (at such Indemnifying  Party's expense) to assume
the defense of any claim or any litigation  resulting  therefrom,  provided that
counsel for the Indemnifying  Party, who shall conduct the defense of such claim
or litigation,  shall be reasonably  satisfactory to the Indemnified  Party, and
the Indemnified  Party may participate in such defense at such party's  expense,
and provided further,  that the omission by any Indemnified Party to give notice
as provided herein shall not relieve the  Indemnifying  Party of its obligations
under this Section  11(f)  except to the extent that the  omission  results in a
failure of actual notice to the Indemnifying Party and such Indemnifying  Party,
in the defense of any 
                                       13

such claim or  litigation,  shall,  except with the consent of each  Indemnified
Party,  consent to entry of any judgment or enter into any settlement which does
not  include as an  unconditional  term  thereof  the giving by the  claimant or
plaintiff to such  Indemnified  Party of a release from all liability in respect
to such claim or litigation.

                    (iv) If the  indemnification  provided  for in this  Section
11(f) is unavailable or  insufficient  to hold harmless an Indemnified  Party in
respect of any  losses,  claims,  damages,  liabilities,  expenses or actions in
respect thereof referred to herein, then the Indemnifying Party shall contribute
to the  amount  paid or payable  by such  Indemnified  Party as a result of such
losses, claims, damages, liabilities,  expenses or actions in such proportion as
is appropriate to reflect the relative  fault of the  Indemnifying  Party on the
one  hand,  and the  Indemnified  Party on the  other,  in  connection  with the
statements  or  omissions  which  resulted  in  such  losses,  claims,  damages,
liabilities,  expenses  or  actions  as well  as any  other  relevant  equitable
considerations, including the failure to give the notice required hereunder. The
relative  fault of the  Indemnifying  Party and the  Indemnified  Party shall be
determined by reference  to, among other  things,  whether the untrue or alleged
untrue  statement  of a material  fact  relates to  information  supplied by the
Indemnifying  Party or the Indemnified  Party and the parties'  relative intent,
knowledge,  access to  information  and  opportunity  to correct or prevent such
statement or omission.  The Company and the  Warrantholders  agree that it would
not be just and equitable if  contributions  pursuant to this Section 11(f) were
determined by pro rata allocation or by any other method of allocation which did
not take account of the equitable  considerations  referred to above. The amount
paid or  payable  to an  Indemnified  Party as a result of the  losses,  claims,
damages,  liabilities or actions in respect thereof, referred to above, shall be
deemed  to  include  any legal or other  expenses  reasonably  incurred  by such
Indemnified Party in connection with  investigating or defending any such action
or claim.  Notwithstanding the contribution provisions of this Section 11(f), in
no event shall the amount  contributed by any seller of Registrable Stock exceed
the  aggregate  net offering  proceeds  received by such seller from the sale of
Registrable Stock to which such contribution or  indemnification  claim relates.
No person guilty of fraudulent misrepresentations (within the meaning of Section
11(f) of the Securities Act) shall be entitled to  contribution  from any person
who is not guilty of such fraudulent misrepresentation.

                    (v) The indemnification required by this Section 11(f) shall
be made by periodic  payments during the course of the investigation or defense,
as and when bills are received or expenses  incurred.  Anything contained herein
to the contrary  notwithstanding,  the  liability  of any holder of  Registrable
Stock under this  Section  11(f) shall not exceed the amount of the net proceeds
actually received by such holder from the sale of its Registrable Stock pursuant
to the  registration,  qualification,  notification  or compliance in respect of
which such liability arose.
                                       14

          (g)  Reporting  Requirements  Under  Exchange  Act. The Company  shall
maintain the  registration  of its Common Stock under Section 12 of the Exchange
Act and shall  keep  effective  such  registration  and shall  timely  file such
information, documents and reports the Commission may require or prescribe under
Section 13 of the Exchange Act, or otherwise.  Immediately upon becoming subject
to the reporting requirements of either Section 13 or 15(d) of the Exchange Act,
the Company  shall  forthwith  upon request,  furnish any holder of  Registrable
Stock (i) a written  statement  by the Company  that it has  complied  with such
reporting  requirements,  (ii) a copy of the most  recent  annual  or  quarterly
report of the Company,  and (iii) such other reports and documents  filed by the
Company with the  Commission as such holder may  reasonably  request in availing
itself of an exemption for the sale of  Registrable  Stock without  registration
under the Securities Act. The Company  acknowledges  and agrees that the purpose
of the requirements contained in this Section 11(g) is to enable any such holder
to comply with the current  public  information  requirement a contained in Rule
144 under the  Securities  Act should such holder ever wish to dispose of any of
the  securities  of the Company  acquired by it without  registration  under the
Securities  Act in  reliance  upon  Rule  144 (or any  other  similar  exemptive
provision).  In addition,  the Company  shall take such other  measures and file
such other information,  documents and reports as shall hereafter be required by
the  Commission  as a condition  to the  availability  of Rule 144 and Rule 144A
under the  Securities  Act (or any  similar  exemptive  provision  hereafter  in
effect).

          (h)  Stockholder  Information.  The Company may require each holder of
Registrable  Stock as to which any  registration  is to be effected  pursuant to
this  Section 11 to furnish the Company  such  information  with respect to such
holder and the  distribution of such  Registrable  Stock as shall be required by
law or by the Commission in connection therewith.

     12.  Representation  and  Warranties  of the  Company.  The Company  hereby
represents and warrants to and covenants with Lender,  each  Warrantholder,  and
each holder of Warrant Shares that:

          (a) Organization and  Capitalization of the Company.  The Company is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware.  As of the date hereof,  the authorized capital of the
Company  consists of 17,000,000  shares of Common Stock and 5,000,000  shares of
Preferred  Stock,  of which  6,739,324  shares of Common  Stock and no shares of
Preferred  Stock are issued and  outstanding.  The Company has, and at all times
during the Exercise  Period will have,  reserved  for  issuance  pursuant to the
Warrants that number of shares of Common Stock that are issuable pursuant to the
Warrants.  Except as otherwise  described in the Company's Annual Report on Form
10-K for the fiscal year ended  December 31, 1996 (as amended) or the  Company's
Quarterly  Report on Form  10-Q for the  fiscal  quarter  ended  March 31,  1997
(collectively,  the "SEC  Reports"),  no  unissued  shares of  Common  Stock are
reserved  for any  purpose  other than for  issuance  upon the  exercise  of the
Warrants.  As of the date  hereof,  except  as  otherwise  described  in the SEC
Reports or as  disclosed to Lender in  connection  with the  Company's  proposed
offering of Senior  Subordinated  
                                       15

Notes,  and except for stock options granted under the Company's  employee stock
option  plans  subsequent  to  December  31,  1996 and  warrants  issued  to the
underwriters in connection with the Company's 1994 initial public offering,  the
Company  has not  issued  or  agreed  to issue  any  stock  purchase  rights  or
convertible  securities  (other than this Warrant),  and there are no preemptive
rights in effect with respect to the issuance of any shares of Common Stock. All
the  outstanding  shares  of  Common  Stock  have been  validly  issued  without
violation of any preemptive or similar rights,  are fully paid and nonassessable
and have  been  issued in  compliance  with all  federal  and  applicable  state
securities laws.

          (b) Authority.  The Company has full corporate  power and authority to
execute and deliver this Warrant,  to issue the shares of Common Stock  issuable
upon exercise of this Warrant, and to perform all of its obligations  hereunder,
and the execution,  delivery and performance  hereof has been duly authorized by
all necessary  corporate action on its part. This Warrant has been duly executed
on behalf of the Company and constitutes the legal, valid and binding obligation
of the Company enforceable in accordance with its terms.

          (c) No Legal Bar.  Neither the  execution,  delivery or performance of
this  Warrant  nor the  issuance  of the shares of Common  Stock  issuable  upon
exercise of this Warrant will (a) conflict  with or result in a violation of the
Certificate  of  Incorporation  or By-Laws of the Company,  (b) conflict with or
result  in a  violation  of  any  law,  statute,  regulation,  order  or  decree
applicable  to  the  Company  or any  affiliate,  (c)  require  any  consent  or
authorization  or filing with, or other act by or in respect of any governmental
authority,  or (d)  result  in a  breach  of,  constitute  a  default  under  or
constitute an event creating rights of acceleration, termination or cancellation
under any mortgage, lease, contract, franchise, instrument or other agreement to
which the Company is a party or by which it is bound.

          (d) Validity of Shares.  When issued upon the exercise of this Warrant
as  contemplated  herein,  the shares of Common  Stock so issued  will have been
validly issued and will be fully paid and nonassessable. On the date hereof, the
par  value of the  Common  Stock is less  than the  Exercise  Price per share of
Common Stock.

     13. Representations and Warranties of the Warrantholder.  The Warrantholder
hereby represents and warrants to and covenants with the Company that:

          (a) Accredited  Investor.  The Warrantholder is an accredited investor
within the meaning of Rule 501(a) of  Regulation D  promulgated  pursuant to the
Securities Act.

          (b) Investment Intent. The Warrantholder acknowledges that the Warrant
has not been registered under the Securities Act. The Warrantholder is acquiring
the Warrant for investment  purposes and not with a view to the public resale or
distribution  thereof.  The Warrantholder  acknowledges that the Company will be
relying on the  representations  set forth in this Section 13 in  establishing a
private placement exemption for the issuance of this Warrant.
                                       16

     14.  Miscellaneous Provisions.

          (a)  Governing  Law. This Warrant shall be deemed to have been made in
the  State of  Arizona  and the  validity  of this  Warrant,  the  construction,
interpretation,  and enforcement  thereof, and the rights of the parties thereto
shall be determined  under,  governed by, and  construed in accordance  with the
internal laws of the State of Arizona, without regard to principles of conflicts
of law.

          (b) Notices. All notices and other  communications  hereunder shall be
in writing and shall be deemed to have been given when  personally  delivered to
the addressee or five (5) days after being mailed by certified  mail,  addressed
to the address  below stated of the party to which  notice is given,  or to such
changed address as such party may have fixed by notice:

     To the Company:                           MOBILE MINI, INC.
                                               1834 West Third Street
                                               Tempe, Arizona  85281
                                               Attn:  Lawrence Trachtenberg

     To the Warrantholders                     ARIZONA LAND INCOME CORPORATION
     Or holder of Warrant Shares:              2999 North 44th Street, Suite 100
                                               Phoenix, Arizona  85018
                                               Attn:  Tom Hislop

provided,  however, that any notice of change of address shall be effective only
upon receipt.

          (c)  Successors  and Assigns.  This Warrant  shall be binding upon and
inure to the benefit of the Company,  Lender, the Warrantholders and the holders
of Warrant Shares and the  successors,  assigns and  transferees of the Company,
Lender, the Warrantholders and the holders of Warrant Shares.

          (d)  Attorneys'  Fees.  The  Company  agrees to pay,  on  demand,  all
attorneys'  fees  (include  attorneys'  fees  incurred  pursuant to  proceedings
arising under the Bankruptcy Code) and all other costs and expenses which may be
incurred by the  Warrantholders  and the holders of Warrant Shares in connection
with any amendment to this Warrant which may be requested by the Company  and/or
in any action or proceeding in which the Company is not the prevailing party, if
such  action  or  proceeding  is  in  connection   with,   arising  out  of,  or
consequential to the protection,  assertion, or enforcement of rights under this
Warrant.

          (e) Entire Agreement;  Amendments and Waivers. This Warrant sets forth
the  entire  understanding  of the  parties  with  respect  to the  transactions
contemplated  hereby. The 
                                       17

failure of any party to seek  redress  for the  violation  or to insist upon the
strict  performance of any term of this Warrant shall not constitute a waiver of
such term and such party shall be entitled to enforce such term  without  regard
to such  forbearance.  This  Warrant  may be  amended,  the Company may take any
action herein  prohibited or omit to take action herein required to be performed
by it, and any breach of or compliance with any covenant, agreement, warranty or
representation  may be waived,  only if the  Company  has  obtained  the written
consent or written waiver of the majority in interest of the Warrantholders, and
then such consent or waiver shall be effective only in the specific instance and
for the specific purpose for which given.

          (f) Severability. If any term of this Warrant as applied to any person
or to any  circumstance is prohibited,  void,  invalid or  unenforceable  in any
jurisdiction,  such term shall, as to such  jurisdiction,  be ineffective to the
extent of such prohibition or invalidity  without in any way affecting any other
term of this Warrant or affecting the validity or enforceability of this Warrant
or of such provision in any other jurisdiction.

          (g)  Headings.  The  headings in this  Warrant are  inserted  only for
convenience of reference and shall not be used in the construction of any of its
terms.

          (h) Transferability. This Warrant may be assigned, transferred or sold
by Warrantholder only in compliance with the provisions of applicable securities
laws and with the consent of Company which shall not be  unreasonably  withheld;
provided,  however,  that no consent of the Company  shall be  required  for any
assignment  or transfer of this Warrant to any direct or indirect  subsidiary or
parent of the Warrantholders or to any of their officers or employees, or to any
entity in which Warrantholder has a 10% or greater ownership interest.

     IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by its
duly authorized officers effective as of the date first set forth above.

                                   MOBILE MINI, INC.,
                                   a Delaware corporation




                                   By:_________________________________________
                                   Name:_______________________________________
                                   Title:______________________________________


                                       18