Food for thought.

His insurance should cover it, then if he wants to push liability down the food chain that's on him.

Food for thought:  the $5000 you are expecting to spend on repairs, are they needed maintenance items or more cosmetic type improvements?  

I am not trying to kill your dream, just adding some food for thought. 

Family has no interest in taking on the project.

I do not know if you personally would have to provide proof that the mold had been remediated but there are companies that can come in, take indoor air samples, send them to a lab to identify the species and concentrations of spores, write a remediation protocol, and then come back and do a final test after the remediation to make sure it was successful.

Then I’d look into a pest control technologies degree because they will leave food out all day which always attracts vermin .

The fact that so many here are saying "what about" isn't a sign of dream killing...it's free food for thought. 

Also travel, food, gas ect can be written off when traveling from ine to the other. 

Before our food even arrived we discovered a handful of coincidences between our lives (both of us had two year wedding anniversaries that were 3 days apart).