Anonymity is not asset protection and will not prevent claims from arising.

I assume that since it is new construction, over time the ground settles and could probably be the root cause of this. 

Home depot/lowes sells mold test kits you can use once the basement is dried out.Once you have the basement dry, the next order of business is to figure out the cause(s) of the flooding, and hopefully address those causes to prevent future floods.There are multiple potential reasons for your flooding--it could be ground water rising up from underneath the house, it could improper drainage around the house, it could be cracks in the foundation or slab, it could be water coming in through the window wells, it could be all of those things, or it could be something else entirely.  

I have a handful of my employees tried to make false injury claims, but they could never win, since my safety program has an embedded clause that they had not sustained injury during last weeks work, and when it is time for me to do a closeout on the project, they had to sign that the job was done and completed thereby no more work is left for them, this prevents them from collecting unemployment and making false injury claims.Anyway, I won't tell you what you must do to constitute right path, but I will give a scenario where it could go south, what you do with the thought is up to you.

They are licensed and use it to prevent identity fraud.

The window wells should be sealed properly to prevent any water from entering the home, correct?

A good manager will prevent an eviction/trashed house.Just my biased opinion.

Could I buy it on contract from them or would a mortgage prevent me from doing that (I assume it would).

Would knob and tube wiring prevent you from buying an investment property?

My friend is relieved that the tenant is gone but it does not prevent them from trying to claim damage.