I agree with others mentioning defending your contractor when you trust them, or anyone you conduct commerce with. 

@Graham SettersI have limited experience investing in U.S.A. real estate (as a silent partner), but have conducted another type of business in the U.S.A. for quite some time. 

Is there language in there that allows you to conduct any due diligence without penalty?

Conference call your attorney and CPA....

First, become familiar with the duties and responsibilities of your agency relationship and how you are to conduct business with the public.

Flipping houses regularly in such a plan does incur tax known as UBIT since the tax exempt entity is conducting a business and competing with taxpaying businesses as opposed to just making passive investments.  

The investors or operators who advocate wholesaling as taught by these guru methods of assigning contracts as a business model enter the arena of facilitating real estate transactions without a license, tortuous conduct and predatory dealing simply because they follow bad advice.

.- I do not wish to conduct a 1031 exchange, preferring to deploy the profits in stock market investments at this time.Are there any other kinds of significant tax breaks that might be available? 

I was thinking of making the 1st floor conference room available on an appointment basis to the (probable) 7 separate tenants on the top floor, that way they could meet with an elderly client on the 1st floor.

Someone to conduct closings?