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                                                                    Exhibit 99.4

                           Berkshire Mortgage Finance
                        Harbor Plaza, 470 Atlantic Avenue
                              Boston, Massachusetts

June 26, 1998


Mr. G. Steven Dawson
Chief Financial Officer
Camden Property Trust
3200 Southwest Freeway, Suite 1500
Houston, TX  77027

RE:      LAS VEGAS APARTMENT POOL
         LAS VEGAS, NV

Dear Mr. Dawson:

         Berkshire Mortgage Finance Limited Partnership ("BMFLP" or the
"Lender") hereby agrees to make 17 cross collateralized and cross defaulted
loans (the "Loan" or "Mortgage Loan") to Sierra Nevada Multifamily Investment,
LLC, a multiple asset mortgagor, for the projects (the "Project") referenced in
Section 2 hereof, subject to the terms and conditions that follow.

1.       BORROWER. The Borrower shall be Sierra Nevada Multifamily Investment, 
LLC, a Delaware Limited Liability Company. The following must be a Principal in
the Borrower owning an 80% interest: TMT-Nevada Investments LLC. The Borrower
shall be a multiple asset entity owning only the Projects referenced in Section
2 hereof, Oasis Landing, and Oasis Plaza.

2.       LOAN AMOUNTS. The maximum mortgage amounts shall total $180,000,000 as
detailed below:





Project               Loan Amount                     Project                  Loan Amount
- -------               -----------                     -------                  -----------
                                                                     
Oasis Bay            $  6,000,000                   Oasis Crossing            $  3,280,000
Oasis Emerald        $  5,040,000                   Oasis Gateway             $ 20,240,000
Oasis Heritage       $ 24,874,000                   Oasis Island              $  4,720,000
Oasis Meadows        $ 19,840,000                   Oasis Palms               $  8,387,000
Oasis Pearl          $  3,760,000                   Oasis Place               $  7,348,000
Oasis Ridge          $ 13,920,000                   Oasis Rose                $  9,671,000
Oasis Springs        $ 13,040,000                   Oasis Suites              $ 10,400,000
Oasis View           $  7,000,000                   Oasis Vinings             $ 11,120,000
Oasis Vista          $ 11,360,000



         The actual mortgage amounts shall be established by dividing the actual
annual debt service amount by the applicable mortgage constant (calculated to
four decimal points). The actual 

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mortgage amount shall be rounded down to the nearest $1,000 increment, and shall
not exceed the maximum mortgage amount.

3.       INTEREST RATE; AMORTIZATION AND LOAN TERM: This Commitment was approved
using 6.88% per annum as the maximum interest rate on the Loans for achieving
the above maximum mortgage amount. Today's mortgage rate would be 6.78%. Upon
satisfaction of the conditions set forth in this Commitment for the setting of
the interest rate on the Loans, the actual interest rate will be set on a date
between now and the closing date (the "Interest Rate Lock").

         The interest rage on the loans will be calculated at the time of the
Interest Rate Lock by adding a Mortgage Spread of 133 basis points over the
Treasury yield as outlined below in paragraph 5. Unless otherwise agreed to in
writing in advance, before Borrower may request an Interest Rate Lock, all items
set forth in this Commitment as conditions to closing must have been delivered
to Lender and must be satisfactory to Lender in accordance with the requirements
of this Commitment.

         Depending upon the market conditions at the time of Interest Rate Lock,
the interest rate may be different than the rate of interest used in approving
the Loan. In the event that the interest rate exceeds 6.88%, Lender reserves the
right to requalify the loan amounts.

         The Interest Rate includes the Servicing Fee described in paragraph 15
herein. The Mortgage Loans shall be 10 year balloon mortgage loans which is
amortized on a level annuity basis based on a thirty (30) year amortization
period commencing on the first day of the second (2nd) month following the
closing of the Mortgage Loan (the "Closing"). On the maturity date of the
Mortgage Loans, the then-outstanding principal balance plus all accrued and
unpaid interest shall be due and payable.

         In addition to these principal and interest payments, Borrower will be
required to make monthly deposits to escrows established with BMFLP for real
estate taxes, special assessments (if applicable), and insurance premiums. BMFLP
will determine the amounts of these monthly deposits and may adjust these
amounts from time to time in order to maintain adequate balances necessary for
payments as they become due.

4.       SECURITY: The Mortgage Loans will be evidenced by non-recourse 
mortgages or deed of trust notes (the "Mortgage Note" or "Note") which will be
secured by a mortgages or deeds of trust, assignment of rents and security
agreements (the "Mortgage") creating, among other things, first liens on the
Borrower's fee simple interest in the Projects referenced in Section 2 hereof.

5.       FUNDING OF THE LOAN/INTEREST RATE LOCK-IN

         A.        FUNDING OF THE LOANS: The Loans shall be funded through an
                   issuance of Freddie Mac PC Gold mortgage backed securities,
                   in amounts equal to the Loan Amounts, and the PC Gold
                   securities shall be sold to a third party investor under
                   Freddie Mac's Structured Transaction program.

         B.        INTEREST RAGE LOCK-IN: The Loan Amounts have been determined
                   based on the Interest Rate stated in Section 3 hereof, which
                   rate shall be subject to change based upon market conditions
                   until the Interest Rage Lock-In as described herein has
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                   occurred. Upon BMFLP's determination in its sole discretion
                   that there exist no material impediments to closing the Loans
                   in accordance with this Commitment and the Freddie Mac
                   Structured Transaction program, BMFLP shall notify the
                   Borrower that the Borrower may lock the interest rate.
                   Following such notification, the Interest Rage Lock-In shall
                   take place on the date of the Borrower's choosing.

         C.        FREDDIE MAC PC GOLD FUNDING:  Under PC Gold, the Interest
                   Rage shall be calculated as the total of: (1) the bond
                   equivalent yield of U.S. Treasury securities with remaining
                   term equivalent to the term of the Loans and (2) the
                   Mortgage Spread to be set at Interest Rage Lock-In.  As of
                   the date of this Commitment, the Mortgage Spread in the
                   market is approximately 133 basis points, although the
                   Spread may change over time.  The Mortgage Spread is
                   inclusive of servicing fee.

6.       FEES AND CHARGES:

         A. GOOD FAITH DEPOSIT. Simultaneously with Borrower's acceptance of
         this Commitment, Borrower shall pay BMFLP $180,000 as a Good Faith
         Deposit which shall not be refunded for any reason whatsoever. BMFLP
         will apply the Good Faith Deposit towards the Rate Lock Deposit
         described in paragraph 6B hereof.

         B. FREDDIE MAC'S RATE LOCK DEPOSIT. No later than forty-eight (48)
         hours prior to the issuance of an Interest Rate Lock by Freddie Mac,
         Borrower shall deposit with BMFLP a Rate Lock Deposit Fee equal to one
         and one-half percent (1.5%) of the Mortgage Loan amounts (the "Interest
         Rate Lock Deposit"). The Rate Lock Deposit will be applied to the
         Financing Fee at Closing, with the remainder of the Rate Lock Deposit
         refunded following Freddie Mac's purchasing of the loans.

         If Borrower accepts this Commitment in the manner provided in Part A
         above, then Borrower shall have until July 2, 1998, to lock the
         interest rate as described above in Paragraph 5 ("Rate Lock Period").
         If Borrower accepts this Commitment but fails to lock the interest rate
         as described in Paragraph 5, this Commitment shall be null and void and
         Borrower shall pay to Freddie Mac upon demand, a non-delivery fee equal
         to one-half percent (0.5%) of the maximum mortgage amounts.

         C. APPLICATION FEE. Borrower has paid to BMFLP an Application Fee (the
         "Application Fee") equal to $139,500. The Application Fee will be
         considered to be fully earned by BMFLP upon issuance of this
         Commitment.

         D. FINANCING FEE. Simultaneously with Closing, Borrower shall pay BMFLP
         a non-refundable Financing Fee in the amount of $540,000 which amount
         is equal to 0.30% of the Loan Amounts (the "Financing Fee"). The
         Financing Fee shall be included in the RATE Lock Deposit referenced in
         Section 6B hereof. The Financing Fee shall be earned upon receipt and
         shall not be refunded for any reason whatsoever.

         E. LEGAL FEES. At Closing, Borrower shall pay BMFLP $85,000 to be used
         to pay the legal fees and expenses charged by BMFLP's counsel in
         connection with the negotiation and closing of the Mortgage Loan and
         the delivery of the Mortgage Loan to Freddie Mac.
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         F. FORM OF PAYMENT OF FEES. All fees payable under this Commitment
         shall be paid in the form of cash, certified check, or by the wiring of
         immediately available Federal funds.

         G. MORTGAGE WAREHOUSING: The loan shall be funded at Closing utilizing
         BMFLP's warehouse line of credit, which line of credit will be repaid
         through the purchase of the loan. In connection with the funding of the
         loan from BMFLP's warehouse line of credit, Applicant shall pay BMFLP
         as additional interest (whether or not set forth in the Mortgage Note)(
         the positive difference, if any, between the Interest Rate set forth
         herein, and the Interim Rate (hereinafter defined), calculated on the
         principal amount of the Loan from the date of funding to the date the
         loan is purchased by Freddie ac for any day during such period that the
         Interim Rate is the higher rate. The Interim Rate shall only offset
         BMFLP's warehousing costs and shall not include a spread payable to
         BMFLP over its costs. At Closing, BMFLP shall collect an amount equal
         to the anticipated warehouse interest costs. The warehouse expense to
         the Borrower shall not exceed thirty (30) days of positive difference
         as calculated herein.

7.       PREPAYMENT; PREPAYMENT FEES: Prepayment of Loans is permitted in 
accordance with the prepayment provisions of the loan documents.

8.       FUNDS AND ESCROWS: At the Closing, Borrower shall establish the 
following funds and escrows. If these funds and escrows are in the form of cash
they shall be held in a custodial account in a bank selected by Lender.

         A. REPAIR ESCROW. Repair Escrows shall be established in an amount
         totaling $750,831.25 to ensure completion of the work to the Project
         set forth on the Repair/Reserve Schedule attached hereto as Exhibit B.
         Such work must be completed within 365 days after the Closing. BMFLP
         shall hold the Repair Escrows pursuant to the Repair Escrow Agreements
         to be executed at the Closing.

         B. RESERVE FOR REPLACEMENT. At Closing, the Borrower shall not be
         required to fund a replacement reserve, nor will monthly replacement
         reserve deposits be required during the Loan term, except in the event
         of the circumstances described in the Loan Documents.

9.       LOAN DOCUMENTS: The Loans shall be evidenced and secured by such 
documents ("Loan Documents") as BMFLP and/or Freddie Mac require. The Loan
Documents shall be delivered to BMFLP fully executed and in final form at the
Closing. All of the Loan Documents shall be executed by properly authorized
principals and/or officers of Borrower. All agreements, documents, guaranties
and similar instruments shall be issued or executed by parties and institutions
acceptable to BMFLP.

         At Closing, Borrower must deliver current written opinions of counsel
(who must be licensed in the state in which the Project is located and must be
acceptable to BMFLP), in the form required by BMFLP. BMFLP and Freddie Mac may
require changes or modifications and must approve and accept any changes or
modifications made by Borrower or Borrower's representative to that form.
Borrower's counsel's opinion must cover any other matters BMFLP or Freddie Mac
may require.

         At Closing, Borrower must execute and deliver to BMFLP a Certificate of
Borrower in the form required by BMFLP. BMFLP may require changes or
modifications and must approve and accept any changes or modifications to this
form. 
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         BMFLP's counsel will prepare the Mortgage Note, Mortgage, estoppel
certificate and any required escrow agreements, together with certain
assignments of the Loan Documents to Freddie Mac Borrower and Borrower's counsel
and agents are responsible for preparing or obtaining all other Loan Documents.
All Loan Documents Borrower and Borrower's counsel and agents are required to
prepare or obtain shall be provided to BMFLP and BMFLP's counsel for review and
approval prior to the Closing.

10.      EXPENSES: Borrower agrees to promptly pay all expenses in connection 
with the underwriting, negotiation, and making of the Mortgage Loans not later
than Closing. In the event that; (i) the Closing does not occur by the date set
forth in paragraph 12 of this Commitment; (ii) any default by Borrower occurs
under this Commitment; or (iii) the Mortgage Loan may not be delivered to
Freddie Mac and purchased by Freddie Mac prior to the date on which Freddie Mac
Commitment expires as the result of any failure of the Project or the Mortgage
Loan to meet BMFLP's requirements and/or those of Freddie Mac or Borrower
defaults under this Commitment, then Borrower shall pay to Freddie Mac a
non-delivery fee equal to two percent (2%) of the maximum mortgage amount,
Borrower also shall pay an amount equal to all fees and expenses, including
attorneys' fees incurred in connection with this Commitment, Freddie Mac
Commitment and the Mortgage Loan for which BMFLP has not been previously
reimbursed. Borrower agrees to pay such fees and expenses within five (5) days
of receipt of a statement from BMFLP describing such fees and expenses.

11.      LATE PAYMENTS. In the event that any installment of principal and 
interest under the Note is not paid by the fifth (5th) day of the month in which
such installment is due, a late charge in an amount equal to five percent (5%)
of such installment of principal and interest will be due and payable. In
addition, if any payment under the Note is not received within thirty (30) days
after the scheduled payment's due date, BMFLP may charge Default Interest (as
defined below) on that delinquent payment for the period beginning on the first
(1st) day of the delinquency to the date BMFLP receives that delinquent payment.
"Default Interest" shall mean interest at that rate of interest which is equal
to the lesser of; (i) the Interest Rate borne by the Note plus four percent
(4%); or (ii) the maximum interest rate provided by law.

12.      CLOSING. Upon Borrower's compliance with all requirements of this
Commitment, BMFLP will schedule the Closing. After consulting with Borrower,
BMFLP will designate a place and time for the Closing. The Closing must occur on
not later than the fifth (5th) business day following Freddie Mac Interest Rate
Lock (the "Closing Deadline"). BMFLP may, in its sole discretion, extend the
Closing Deadline in the event that BMFLP determined that Borrower will be able
to comply with all requirements of this Commitment and Freddie Mac prior to the
expiration of that extension of the Closing Deadline and that the delivery of
the Mortgage Loan to Freddie Mac can occur prior to the expiration date of
Freddie Mac Commitment. Ia the event that the Closing does not occur by the
Closing Deadline, this Commitment shall expire and be of no force or effect, and
BMFLP shall retain all amounts previously paid by Borrower. Borrower
acknowledges that the failure or inability to deliver the Mortgage Loan to
Freddie Mac following Rate Lock as required by Freddie Mac Commitment will
result in Freddie Mac retaining the 1.5% Rate Lock Deposit, and Borrower shall
be required to pay on demand an additional 0.5% as a "pull out" fee and hedge
loss.

13.      ASSIGNMENT OF COMMITMENT: This Commitment shall not be assignable or
assigned by Borrower to any other person or entity without the express written
consent of BMFLP and any 
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attempted assignment of this Commitment shall automatically terminate this
Commitment. Upon such termination, BMFLP shall retain all amounts previously
received as liquidated damages.

         BMFLP may assign this Commitment, the Mortgage Loans and all related
Loan Documents without Borrower's consent to Freddie Mac, or to an affiliate,
parent company or any subsidiary of BMFLP. BMFLP may make any other assignment
of this Commitment only with Borrower's consent, which consent shall not be
unreasonably withheld. If requested by BMFLP, Borrower agrees to execute and
deliver all documents necessary to effectuate such assignment.

14.      FINANCIAL CONDITION OF BORROWER AND PROJECT: The financial condition of
the Borrower, the Borrower's General Partner and that of the Projects shall at
all times up to and including Closing, not experience material adverse change.
In the event of any bankruptcy (whether or not voluntary) or similar
proceedings, insolvency, or material adverse change in Borrower's condition or
those of the Projects, any guarantors, or parties affiliated with the foregoing
between the date of this Commitment and the date of Closing, BMFLP may at its
sole discretion declare this Commitment void, whether or not such proceedings or
circumstances shall be existing at the date of Closing.

15.      MATERIAL ADVERSE CHANGE: Freddie Mac shall not be obligated to purchase
the Mortgages if there is any material adverse change in the Borrower's
financial position (or that of any Guarantor or Principal of the Borrower), the
Mortgage Premises, rental income, or any other features of the transaction from
that which existed on the date of Freddie Mac's receipt of Borrower's full
application package.

16.      LOAN SERVICING. BMFLP or its assigns shall service the Loans pursuant
to contractual arrangements between BMFLP and Freddie Mac. In consideration of
that servicing, BMFLP will receive a Servicing Fee, payable monthly. This
Servicing Fee is included in the Interest Rage specified in paragraph 3 herein.

17.      FREDDIE MAC PURCHASE AGREEMENT AND EXTENSION FEE PROVISION: 
Notwithstanding anything in this Commitment to the contrary, the effectiveness
of this Commitment shall be at all times contingent on the issuance by Freddie
Mac of the Freddie Mac Purchase Agreement, the continued validity and
enforceability of the Freddie Mac Purchase Agreement, and on the Borrower's
compliance with the terms and conditions of this Commitment and the Freddie Mac
Purchase Agreement. Borrower agrees to take any and all actions within its
control and to cause any other appropriate parties to take any and all actions
necessary to satisfy all terms and conditions of the Freddie Mac Commitment and
to cause the Mortgage Loans to be purchased by Freddie Mac prior to the date on
which the Freddie Mac Purchase Agreement shall expire.

         Freddie Mac may require that Borrower execute or obtain additional
documents or that revisions be made in the Loan Documents after the execution of
such Loan Documents. In such an event, notwithstanding any passage of time after
the Closing, Borrower agrees to execute such documents or revisions or
amendments to the Loan Documents as Freddie Mac may require and cause to be
provided to Freddie Mac any additional Loan Documents which Freddie Mac may
require, provided such further documents, revisions or amendments shall not
materially alter the terms of the Loan Documents or the obligations of the
Borrower hereunder. 

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         In the event of any conflict between the terms of this Commitment and
the terms and conditions of the Freddie Mac Purchase Agreement, the terms of the
Freddie Mac Purchase Agreement shall prevail.

         BMFLP may, in its sole discretion, extend this Commitment on the
condition that Borrower provides to BMFLP with a current certified rent roll and
any necessary updates to, or additional information required by BMFLP or as
required by Freddie Mac. In the event that this Commitment expires and the
Freddie Mac Purchase Agreement has not been executed and so long as no default
by Borrower under this Commitment has occurred prior to that time, BMFLP shall
return to Borrower the Rate Lock Deposit less out of pocket costs and neither
Borrower nor BMFLP shall have any further rights or obligations under this
Commitment. In the event that there exists a default by Borrower under this
Commitment prior to the expiration of this Commitment as stated in this
paragraph, BMFLP shall retain as liquidated damages all amounts previously paid
to BMFLP.

         In the event that Loan Closing has not taken place within thirty (30)
business days from the date of this commitment, this commitment shall be of no
further force or effect.

18.      GUARANTORS. Freddie Mac has identified Camden Subsidiary, Inc. and TMT
Nevada LLC as Guarantors in this transaction. In Accordance with the Freddie
Mac's program, Guarantors are required to execute the Exculpation Rider to Note
and Security Instrument and Guaranty Agreement. Base recourse is not required;
therefore "zero" must be inserted in the Exculpation Rider and Guaranty.

19.      CONFLICTING PROVISIONS: In the event of any conflict between the terms
hereof and the terms and conditions of the Loan Documents, the Loan Documents
executed at the time of Closing shall prevail.

20.      COMPLETE AGREEMENT: This Commitment, together with the Exhibits 
attached hereto, when executed by the parties hereto contains the complete and
entire understanding of the parties hereto and no changes will be recognized as
valid unless they are made in writing and similarly executed. No specific waiver
of any of the terms hereof shall be considered as a general waiver. The terms
and conditions of this Commitment s hall survive the Closing of the Mortgage
Loan.

21.      SECONDARY FINANCING: Secondary financing with respect to the Project or
the imposition of junior liens on the Project shall be permitted only with the
prior written approval of BMFLP and Freddie Mac and only on such terms and
conditions as may be imposed by BMFLP and Freddie Mac in their sole discretion.

22.      CORRESPONDENT/BROKERAGE: By acceptance of this Commitment, Borrower 
agrees to pay any and all fees imposed or charged by all brokers hired by the
Borrower who brought about the issuance of this Commitment or the making of the
Mortgage Loan pursuant hereto, and agrees to indemnify and hold BMFLP harmless
from and against any and all claims, demands and liability for brokerage
commissions, assignment fees, finders fees or other compensation whatsoever
arising from this Commitment or Lender's making of the Mortgage Loan which may
be asserted against Lender by any person or entity. BMFLP hereby agrees to pay
any and all fees imposed or charged by all brokers contracted solely by BMFLP.
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23.      ACCEPTANCE OF COMMITMENT: To accept this Commitment, please return to
BMFLP one copy hereof with your acceptance duly executed thereon, together with
the Good Faith Deposit set forth in paragraph 6(a) hereof. Unless the accepted
Commitment and the Good Faith Deposit are received by BMFLP on or before June
26, 1998, this Commitment shall automatically terminate and be null and void and
BMFLP shall have no further liability or obligation hereunder whatsoever.

24.      SPECIAL AND GENERAL CONDITIONS; EFFECTIVENESS OF COMMITMENT: This 
Commitment is conditioned upon and is made subject to the satisfaction of the
Special Conditions set forth in Exhibit A attached hereto and incorporated
herein by reference. This Commitment is further conditioned upon and made
subject to the Loan Documents incorporated herein by reference.

25.      OCCUPANCY AND CHANGE IN FINANCIAL CONDITION CERTIFICATIONS: This 
Commitment is conditioned upon BMFLP's receipt, review, and approval of June,
1998 rents rolls for each Project, certified by the Borrower, indicating
aggregate rental income of at least $2,590,000.

         A rent schedule, meeting the requirements for Section 19.3(b) of the
Freddie Mac Guide and dated no more than fifteen (15) days prior to the
Origination Date, must be delivered to Freddie Mac with the final loan delivery
package.

         Please execute both originals of this Commitment and return one (1)
original to BMFLP on or before June 26, 1998. We look forward to working with
you on this transaction.

                                        Very truly yours,

                                        BERKSHIRE MORTGAGE FINANCIAL
                                        LIMITED PARTNERSHIP


                                        By:      /s/Jeff McVehil
                                                 -------------------------------
                                                 Jeff McVehil
                                                 Vice President
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                                   ACCEPTANCE

         The undersigned hereby accepts the foregoing Commitment and agrees; (i)
to perform or cause to be performed all of the obligations on the part of
Borrower contained therein; (ii) to be bound by all of the terms, provisions and
conditions thereof; and (iii) to cause the Closing of the Mortgage Loan to be
consummated. Berkshire Mortgage Finance Corporation may utilize the fact that it
is providing financing for the Project in marketing and promotional activities
undertaken by the Berkshire Mortgage Finance Corporation.

By:  /s/ G. Steven Dawson
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     Sr. Vice President and Chief Financial Officer of Camden Subsidiary, Inc.
         Managing Member of Sierra Nevada Multifamily Investments, LLC