They will not indicate strengths, weaknesses, or anything from reviews or personal files. 

The water usage was different every day indicating that it was not a water leak and abruptly went to zero on 9/20.

DSTs like @Matt K. indicated are one such product that is passive cash producing and 1031 compliant. 

Last year, the economic indicators pegged SFH appreciation in the area at 8%.  

The fact they are complaining online might be an indication the property manager dealt with them properly so be sure to ask the manager for their side of the story.I hope this basic guide helps.

Moving the property into an LLC soon after, also indicates to me he likely did not move in, as hed lose both the benefits of being an owner occupant, and the LLC would be easily piercable if he were living in the property.

The fact they are complaining online might be an indication the property manager dealt with them properly so be sure to ask the manager for their side of the story.I hope this basic guide helps.

Do you work for this developer, as you have indicated on other forums, or are you actually an investor?

If it's a recent sale, as @Russell Brazil indicates, an appraiser could very well treat the property as its own comp.

He indicated, however, that had the toilet not been clogged up (which according to the tenant and building maintenance man was the case), the toilet would have just kept running (without flooding) until someone jiggled the handle or such.