Im am thinking he is out there but not sure what harm  he can really do or would be willing to as he knows I am a former retired cop which somehow came up in conversation.

no harm to ask.

I just made an additional listing live - even if it doesn't work as well for my market, I doubt it could cause any harm. :) Anyone else with a similar situation?

Hi Nicole,If you are getting a great return and do not mind the cash being tied up in the property then there is no harm in waiting to rehab. 

PB has been found to have its structural integrity reduced compared to other materials because of the way many chemicals in public water supplies react to it, breaking it down and causing small cracks over a long period of time.

Asbestos is generally not harmful if left undisturbed.

Which is more ethical: to tell us his name to keep others from being harmed by his incompetence and obvious lack of professionalism, or to keep silent?

You will cost yourself more harm than good by not setting up everything correctly in advance.

Example, the lender used when I spoke with about move in ready, was the property can't harm you in any way, example would be broken glass messed up flooring that could trip you.  

Outside of my interest in REI, I'm just a sales guy with a chemical engineering background.