Document:

EX-10.3

SECOND AMENDMENT TO AGREEMENT FOR

PURCHASE AND SALE OF REAL PROPERTY AND ESCROW INSTRUCTIONS

This SECOND AMENDMENT TO AGREEMENT FOR PURCHASE AND SALE OF REAL PROPERTY AND ESCROW
INSTRUCTIONS (this “Second Amendment”) is entered into as of July 10, 2007, by and between KOKOMO
MEDICAL OFFICE PARK, L.P., an Indiana limited partnership (“Seller”), and TRIPLE NET PROPERTIES,
LLC, a Virginia limited liability company (“Buyer”), with reference to the following Recitals:

R E C I T A L S

A. Seller and Buyer have previously entered into that certain Agreement for Purchase and Sale
of Real Property and Escrow Instructions dated as of June 12, 2007, as amended by that certain
First Amendment to Agreement for Purchase and Sale of Real Property and Escrow Instructions dated
June 25, 2007 by and between Seller and Buyer (collectively, the “Purchase Agreement”), wherein
Seller agreed to sell to Buyer, and Buyer agreed to purchase from Seller, that certain “Property”
more particularly described in the Purchase Agreement, on the terms and conditions set forth in the
Purchase Agreement.

B. Seller and Buyer desire to amend the Purchase Agreement as more particularly set forth
herein.

NOW, THEREFORE, in consideration of the foregoing Recitals (which are incorporated herein by
this reference) and for other good and valuable consideration, the receipt and sufficiency of which
are herby acknowledged, the parties hereto agree as follows:

A G R E E M E N T

1. Definitions. All initially capitalized terms not otherwise defined herein shall
have the meanings given to such terms in the Purchase Agreement unless the context clearly
indicates otherwise. All references to “the Agreement” or “this Agreement” in the Purchase
Agreement or in this Second Amendment shall mean and refer to the Purchase Agreement as amended by
this Second Amendment.

2. Due Diligence Period. Notwithstanding anything to the contrary contained in the
Purchase Agreement, as of the date of this Second Amendment, the Due Diligence Period shall be
deemed to conclude on Friday, July 27, 2007.

3. Effect of this Second Amendment. Except as amended and/or modified by this Second
Amendment, the Purchase Agreement is hereby ratified and confirmed and all other terms of the
Purchase Agreement are and shall remain in full force and effect, unaltered and unchanged by this
Second Amendment. In the event of any conflict between the provisions of this Second Amendment and
the provisions of the Purchase Agreement, the provisions of this Second Amendment shall control.
Whether or not specifically amended by this Second Amendment, all of the terms and provisions of
the Purchase Agreement are hereby amended to the extent necessary to give effect to the purpose and
intent of this Second Amendment.

4. Counterparts. This Second Amendment may be executed in any number of counterparts
with the same effect as if all of the parties had signed the same document. All counterparts shall
be construed together and shall constitute one agreement.

[Signatures on next page]

1

IN WITNESS WHEREOF, the parties hereto have caused this Second Amendment to be executed by
their duly authorized representatives as of the date first referenced above.

	 	 	 
	SELLER:

	 	KOKOMO MEDICAL OFFICE PARK, L.P.

an Indiana limited partnership
	
 
	 	By: KOKOMO MEDICAL DEVELOPERS, INC.,

General Partner

By: /s/ Stephen P. Hokanson

Stephen P. Hokanson, President
	BUYER:

	 	TRIPLE NET PROPERTIES, L.L.C.,

a Virginia limited liability company
	
 
	 	By: /s/ Jack Maurer

Name: Jack Maurer

Title: Executive Vice President

2EX-10.4

THIRD AMENDMENT TO AGREEMENT FOR

PURCHASE AND SALE OF REAL PROPERTY AND ESCROW INSTRUCTIONS

This THIRD AMENDMENT TO AGREEMENT FOR PURCHASE AND SALE OF REAL PROPERTY AND ESCROW
INSTRUCTIONS (this “Third Amendment”) is entered into as of July 26, 2007, by and between KOKOMO
MEDICAL OFFICE PARK, L.P., an Indiana limited partnership (“Seller”), and TRIPLE NET PROPERTIES,
LLC, a Virginia limited liability company (“Buyer”), with reference to the following Recitals:

R E C I T A L S

A. Seller and Buyer have previously entered into that certain Agreement for Purchase and Sale
of Real Property and Escrow Instructions dated as of June 12, 2007, as amended by (a) that certain
First Amendment to Agreement for Purchase and Sale of Real Property and Escrow Instructions dated
June 25, 2007 by and between Seller and Buyer, and (b) that certain Second Amendment to Agreement
for Purchase and Sale of Real Property and Escrow Instructions dated July 10, 2007 by and between
Seller and Buyer (collectively, the “Purchase Agreement”), wherein Seller agreed to sell to Buyer,
and Buyer agreed to purchase from Seller, that certain “Property” more particularly described in
the Purchase Agreement, on the terms and conditions set forth in the Purchase Agreement.

B. Seller and Buyer desire to amend the Purchase Agreement as more particularly set forth
herein.

NOW, THEREFORE, in consideration of the foregoing Recitals (which are incorporated herein by
this reference) and for other good and valuable consideration, the receipt and sufficiency of which
are herby acknowledged, the parties hereto agree as follows:

A G R E E M E N T

1. Definitions. All initially capitalized terms not otherwise defined herein shall
have the meanings given to such terms in the Purchase Agreement unless the context clearly
indicates otherwise. All references to “the Agreement” or “this Agreement” in the Purchase
Agreement or in this Third Amendment shall mean and refer to the Purchase Agreement as amended by
this Third Amendment.

2. Due Diligence Period. Notwithstanding anything to the contrary contained in the
Purchase Agreement, as of the date of this Third Amendment, the Due Diligence Period shall be
extended and deemed to conclude on Tuesday, August 7, 2007.

3. Effect of this Third Amendment. Except as amended and/or modified by this Third
Amendment, the Purchase Agreement is hereby ratified and confirmed and all other terms of the
Purchase Agreement are and shall remain in full force and effect, unaltered and unchanged by this
Third Amendment. In the event of any conflict between the provisions of this Third Amendment and
the provisions of the Purchase Agreement, the provisions of this Third Amendment shall control.
Whether or not specifically amended by this Third Amendment, all of the terms and provisions of the
Purchase Agreement are hereby amended to the extent necessary to give effect to the purpose and
intent of this Third Amendment.

4. Counterparts. This Third Amendment may be executed in any number of counterparts
with the same effect as if all of the parties had signed the same document. All counterparts shall
be construed together and shall constitute one agreement.

[Signatures on next page]

1

IN WITNESS WHEREOF, the parties hereto have caused this Third Amendment to be executed by
their duly authorized representatives as of the date first referenced above.

	 	 	 
	SELLER:

	 	KOKOMO MEDICAL OFFICE PARK, L.P.

an Indiana limited partnership
	
 
	 	By: KOKOMO MEDICAL DEVELOPERS, INC.,

General Partner

By: /s/ Stephen P. Hokanson

Stephen P. Hokanson, President
	BUYER:

	 	TRIPLE NET PROPERTIES, L.L.C.,

a Virginia limited liability company
	
 
	 	By: /s/ Jack Maurer

Name: Jack Maurer

Title: Executive Vice President

2EX-10.5

FOURTH AMENDMENT TO AGREEMENT FOR

PURCHASE AND SALE OF REAL PROPERTY AND ESCROW INSTRUCTIONS

This FOURTH AMENDMENT TO AGREEMENT FOR PURCHASE AND SALE OF REAL PROPERTY AND ESCROW
INSTRUCTIONS (this “Fourth Amendment”) is entered into as of August 7, 2007, by and between KOKOMO
MEDICAL OFFICE PARK, L.P., an Indiana limited partnership (“Seller”), and TRIPLE NET PROPERTIES,
LLC, a Virginia limited liability company (“Buyer”), with reference to the following Recitals:

R E C I T A L S

A. Seller and Buyer have previously entered into that certain Agreement for Purchase and Sale
of Real Property and Escrow Instructions dated as of June 12, 2007, as amended by (a) that certain
First Amendment to Agreement for Purchase and Sale of Real Property and Escrow Instructions dated
June 25, 2007, by and between Seller and Buyer, (b) that certain Second Amendment to Agreement for
Purchase and Sale of Real Property and Escrow Instructions dated July 10, 2007, by and between
Seller and Buyer, and (c) that certain Third Amendment to Agreement for Purchase and Sale of Real
Property and Escrow Instructions dated July 26, 2007, by and between Seller and Buyer
(collectively, the “Purchase Agreement”), wherein Seller agreed to sell to Buyer, and Buyer agreed
to purchase from Seller, that certain “Property” more particularly described in the Purchase
Agreement, on the terms and conditions set forth in the Purchase Agreement.

B. Seller and Buyer desire to amend the Purchase Agreement as more particularly set forth
herein.

NOW, THEREFORE, in consideration of the foregoing Recitals (which are incorporated herein by
this reference) and for other good and valuable consideration, the receipt and sufficiency of which
are herby acknowledged, the parties hereto agree as follows:

A G R E E M E N T

1. Definitions. All initially capitalized terms not otherwise defined herein shall
have the meanings given to such terms in the Purchase Agreement unless the context clearly
indicates otherwise. All references to “the Agreement” or “this Agreement” in the Purchase
Agreement or in this Fourth Amendment shall mean and refer to the Purchase Agreement as amended by
this Fourth Amendment.

2. Due Diligence Period. Notwithstanding anything to the contrary contained in the
Purchase Agreement, as of the date of this Fourth Amendment, the Due Diligence Period shall be
extended and deemed to conclude on Tuesday, August 14, 2007.

3. Effect of this Fourth Amendment. Except as amended and/or modified by this Fourth
Amendment, the Purchase Agreement is hereby ratified and confirmed and all other terms of the
Purchase Agreement are and shall remain in full force and effect, unaltered and unchanged by this
Fourth Amendment. In the event of any conflict between the provisions of this Fourth Amendment and
the provisions of the Purchase Agreement, the provisions of this Fourth Amendment shall control.
Whether or not specifically amended by this Fourth Amendment, all of the terms and provisions of
the Purchase Agreement are hereby amended to the extent necessary to give effect to the purpose and
intent of this Fourth Amendment.

4. Counterparts. This Fourth Amendment may be executed in any number of counterparts
with the same effect as if all of the parties had signed the same document. All counterparts shall
be construed together and shall constitute one agreement.

[Signatures on next page]

1

IN WITNESS WHEREOF, the parties hereto have caused this Fourth Amendment to be executed by
their duly authorized representatives as of the date first referenced above.

	 	 	 
	SELLER:

	 	KOKOMO MEDICAL OFFICE PARK, L.P.

an Indiana limited partnership
	
 
	 	By: KOKOMO MEDICAL DEVELOPERS, INC.,

General Partner

By: /s/ Stephen P. Hokanson

Stephen P. Hokanson, President
	BUYER:

	 	TRIPLE NET PROPERTIES, L.L.C.,

a Virginia limited liability company
	
 
	 	By: /s/ Richard Hutton

Name: Richard Hutton

Title: Executive Vice President

2

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