EXHIBIT 10.5 DIVERSIFIED INVESTMENTS PORTFOLIO FIRST AMENDMENT TO PURCHASE AND SALE AGREEMENT THIS FIRST AMENDMENT TO PURCHASE AND SALE AGREEMENT (this "Amendment") is made and entered into as of the 23rd day of December, 2003, by and among MHC OPERATING LIMITED PARTNERSHIP (together with its affiliates, designees and assigns, the "Purchaser"), an Illinois limited partnership having an address of Two North Riverside Plaza, Suite 800, Chicago, Illinois 60606, DIVERSIFIED INVESTMENTS SERVICES, LLC ("Diversified"), a Delaware limited liability company having an address of 7625 Wisconsin Avenue, Suite 150, Bethesda, Maryland 20814, and the Sellers, each having an address of c/o Diversified Investments Services, LLC, 7625 Wisconsin Avenue, Suite 150, Bethesda, Maryland 20814. R E C I T A L S: A. The parties hereto have entered into that certain Purchase and Sale Agreement dated as of December 8, 2003 (the "Purchase Agreement"). Capitalized terms used but not otherwise defined herein shall have the meanings set forth in the Purchase Agreement. B. The parties hereto desire to amend the Purchase Agreement as hereinafter provided. THEREFORE, the parties hereto agree to amend the Purchase Agreement as follows: A G R E E M E N T: 1. CACTUS GARDENS. Sections 5.A. and 5.C.(v) are amended to reflect that Purchaser has submitted a loan application to LaSalle Bank National Association ("LaSalle") for a first mortgage loan to be secured by the Cactus Gardens Property with a loan amount of $4,500,000 (the "Cactus Gardens Loan Application"). The loan proceeds of $4,500,000 is based on preliminary underwriting by LaSalle which is subject to further underwriting by LaSalle. As soon as Purchaser and Seller receive approval from the servicer of the current loan on the Cactus Gardens Property that such loan can be defeased within ninety (90) days, Purchaser intends to enter into a rate lock agreement with LaSalle for $4,500,000 for a loan for the Cactus Gardens Property. The Closing Date for the Cactus Gardens Property shall occur on a date which is mutually agreed upon by the parties hereto which is within the 90 day rate lock period but not later than May 15, 2004. To induce Purchaser to enter into a rate lock agreement for the loan for the Cactus Gardens Property, Seller hereby waives its right not to sell the Cactus Gardens Property to Purchaser based on the proceeds of the loan being below $5,050,000. Purchaser and Seller shall use commercially reasonable efforts to cause LaSalle to increase the amount of the first mortgage loan on the Cactus Gardens Property above $4,500,000 on the same terms contained in the Cactus Gardens Loan Application attached hereto as Exhibit A (the "Application"), provided that Purchaser agrees to pay the then current market interest rate on that portion of the Cactus Gardens Property first mortgage loan which exceeds $4,500,000 based on the terms of the Application (but without the rate lock feature in place on the $4,500,000). Seller acknowledges that to the extent that loan proceeds made available by LaSalle from the loan on 1 the Cactus Gardens Property is materially less than $5,050,000, Purchaser shall receive a credit against the Purchase Price allocated to the Cactus Gardens Property in an amount equal to the amount by which said loan proceeds are less than $5,050,000. For example, if such loan proceeds equal $5,000,000, Purchaser will receive a credit against the Purchase Price equal to $50,000. 2. EFFECT. Except as amended herein, all terms and provisions contained in the Purchase Agreement shall remain in full force and effect. 3. COUNTERPARTS. This Amendment may be executed in one or more counterparts, all of which taken together shall constitute one and the same agreement. [SIGNATURE PAGES FOLLOW] 2 IN WITNESS WHEREOF, the parties have executed this Amendment as of the respective dates set forth below. WITNESSES: PURCHASER: __________________________________ MHC OPERATING PARTNERSHIP, Name:_____________________________ an Illinois limited partnership __________________________________ Name:_____________________________ By: MANUFACTURED HOME COMMUNITIES, INC., a Maryland corporation, its general partner By:__________________________________ Name:_____________________________ Title:____________________________ Date: December ___, 2003 3 WITNESSES: SELLERS: __________________________________ COACHWOOD COLONY MHP, LLC, a Florida Name:_____________________________ limited liability company __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - COACHWOOD COLONY MHP, LLC, a Florida limited liability company, as its Sole and Managing Member By: _________________________________ Barry L. Haase Manager WITNESSES: DIVERSIFIED INVESTMENTS - COACHWOOD COLONY MHP, LLC, a Florida limited __________________________________ liability company Name:_____________________________ __________________________________ By: __________________________________ Name:_____________________________ Barry L. Haase Manager WITNESSES: SHANGRI-LA MOBILE HOME PARK, L.P., a Delaware limited partnership, authorized to transact business in the State of __________________________________ Florida as SHANGRI-LA MOBILE HOME PARK OF Name:_____________________________ LARGO, LTD. __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - SHANGRI-LA, INC., a Delaware corporation, as its General Partner By: _________________________________ Barry L. Haase Chairman 4 WITNESSES: DIVERSIFIED INVESTMENTS - SHANGRI-LA, INC., a Delaware corporation __________________________________ Name:_____________________________ By: ________________________________ __________________________________ Barry L. Haase Name:_____________________________ Chairman WITNESSES: TAMPA BAY COMMUNITIES, L.P., a Florida limited partnership __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - TBC, INC., __________________________________ a Florida corporation, as its Name:_____________________________ General Partner By: _________________________ Barry L. Haase CEO WITNESSES: SIXTH AVENUE, LLC, a Florida limited liability company __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - SIXTH __________________________________ AVENUE LLC, a Florida limited Name:_____________________________ liability company, as its Sole and Managing Member By: ________________________________ Barry L. Haase Manager WITNESSES: DIVERSIFIED INVESTMENTS - SIXTH AVENUE, LLC, a Florida limited liability company __________________________________ Name:_____________________________ By: ________________________________ __________________________________ Barry L. Haase Name:_____________________________ Manager 5 WITNESSES: SOUTHERNAIRE MHP, LLC, a Florida limited liability company __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - __________________________________ SOUTHERNAIRE, LLC, a Florida limited Name:_____________________________ liability company, as its Sole and Managing Member By: ________________________________ Barry L. Haase Manager WITNESSES: DIVERSIFIED INVESTMENTS - SOUTHERNAIRE, __________________________________ LLC, a Florida limited liability company Name:_____________________________ __________________________________ By:_______________________________ Name:_____________________________ Barry L. Haase Manager WITNESSES: TERRA CEIA, LLC, a Florida limited liability company __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - TERRA CEIA, __________________________________ LLC, a Florida limited liability Name:_____________________________ company, as its Sole and Managing Member By: ________________________________ Barry L. Haase Manager WITNESSES: DIVERSIFIED INVESTMENTS - TERRA CEIA, __________________________________ LLC, a Florida limited liability company Name:_____________________________ __________________________________ By: ________________________________ Name:_____________________________ Barry L. Haase Manager 6 WITNESSES: TOPICS RVP, LLC, a Florida limited liability company __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - TOPICS __________________________________ RVP, LLC, a Florida limited liability Name:_____________________________ company, as its Sole and Managing Member By: ________________________________ Barry L. Haase Manager WITNESSES: DIVERSIFIED INVESTMENTS - TOPICS RVP, LLC, a Florida limited liability company __________________________________ Name:_____________________________ By: __________________________________ __________________________________ Barry L. Haase Name:_____________________________ Manager WITNESSES: GOOSE CK, LLC, a North Carolina limited liability company __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - GC, LLC, a __________________________________ North Carolina limited liability Name:_____________________________ company, as its Sole Member By: EAST WEST COMMUNITIES, LLC, a Delaware limited liability company, as its Sole Member By: DIVERSIFIED INVESTMENTS - EW, LLC, a Delaware limited liability company, as its Managing Member By:__________________________ Barry L. Haase Managing Member 7 WITNESSES: DIVERSIFIED INVESTMENTS - GC, LLC, a North Carolina limited liability company __________________________________ Name:_____________________________ By: EAST WEST COMMUNITIES, LLC, a __________________________________ Delaware limited liability company, Name:_____________________________ as its Sole Member By: DIVERSIFIED INVESTMENTS - EW, LLC, a Delaware limited liability company, as its Managing Member By: ___________________________ Barry L. Haase Managing Member WITNESSES: WATERWAY RV, LLC, a Delaware limited liability company __________________________________ Name:_____________________________ By: SIERRA LAKES, L.L.C., a Delaware __________________________________ limited liability company, as its Name:_____________________________ Sole and Managing Member By: DIVERSIFIED INVESTMENTS PARTNERS, LLC, a Delaware limited liability company, as its Managing Member By:______________________________ Barry L. Haase Managing Member WITNESSES: SIERRA LAKES, L.L.C., a Delaware limited liability company __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS PARTNERS, __________________________________ LLC, a Delaware limited liability Name:_____________________________ company, as its Managing Member By: _______________________________ Barry L. Haase Managing Member 8 WITNESSES: CACTUS GARDENS RV, LLC, an Arizona limited liability company __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - CACTUS __________________________________ GARDENS, LLC, an Arizona limited Name:_____________________________ liability company, as its Managing Member By: ________________________________ Barry L. Haase Manager WITNESSES: DIVERSIFIED INVESTMENTS - CACTUS GARDENS, __________________________________ LLC, an Arizona limited liability company Name:_____________________________ __________________________________ By: __________________________________ Name:_____________________________ Barry L. Haase Manager WITNESSES: DESERT PARADISE RV, LLC, an Arizona limited liability company __________________________________ Name:_____________________________ By: SIERRA LAKES, L.L.C., a Delaware __________________________________ limited liability company, as its Name:_____________________________ Sole and Managing Member By: DIVERSIFIED INVESTMENTS PARTNERS, LLC, a Delaware limited liability company, as its Managing Member By:______________________________ Barry L. Haase Managing Member 9 WITNESSES: SUNI SANDS, LLC, an Arizona limited liability company __________________________________ Name:_____________________________ By: DIVERSIFIED INVESTMENTS - SUNI SANDS, __________________________________ LLC, an Arizona limited liability Name:_____________________________ company, as its Sole and Managing Member By: ________________________________ Barry L. Haase Manager WITNESSES: DIVERSIFIED INVESTMENTS - SUNI SANDS, LLC, an Arizona limited liability company __________________________________ By: ___________________________________ Name:_____________________________ Barry L. Haase __________________________________ Manager Name:_____________________________ WITNESSES: DIVERSIFIED INVESTMENTS SERVICES, LLC, a Delaware limited liability company __________________________________ Name:_____________________________ By: __________________________________ __________________________________ Name: Barry L. Haase Name:_____________________________ Title: Manager 10