Hey @Richard PastorFirst, lets address some incorrect information that is stated above.

But IF the property in question is in compliance with all code, and provides a safe and secure environment, all problems are timely addressed and corrected, and the property is maintained on a professional level, then the investor who has a large capital investment in the property should be entitled to enforce any contracts providing him with the agreed to cash flow. 

Close the Condo Deal: Renegotiate the terms if you can address your concerns, allowing you to defer taxes on the full amount.2.

On large complexes you can look up their website and see if they have a leasing map that identifies address/unit.

Don't give names or addresses, but simply ask hypothetically. 

So, I decided to drive a nearby neighborhood close to my residence, recently and document addresses of seemingly vacant distressed properties.

municipal tax's are a tough one. interest  and bank fees and insurance are all private for profit those can be addressed.

You must have US bank and address 

@Cooper Marcus send me a message with your email address and I'll share it.

I personally think proactively addressing these items is best practices across all of real estate.