There are just so many contacts and documents and phone calls when on site that would likely reveal your ownership. 

This virus has revealed all the cracks and deficiencies of their system.  

I didn't know that a title search could reveal unpaid contractors.So, it sounds like you are saying that I need to put into writing what my terms are before doing any type of foreclosure, because I would be at the mercy of the other 3 if the deed becomes mine due to buying up the taxes?

A fisherman never reveals his favorite hole

These documents will reveal any looming "surprises" such as Special Assessments and Maintenance Fee increases.

Some questions that they ask can reveal if they are party or want to hold parties in the house.  

These would reveal the potential need for a Special Assessment or significant increase in monthly fees to someone knowledgeable about how HOA's operate.

That will reveal the issue.

A credit check has revealed that a prospective tenant has a criminal background of assault on police officer, destruction of police property, and obstruction from five years ago.

Does anyone have any good questions they might ask that might reveal some good information about the market in general, jobs, housing, population...I'm open to any suggestions.