Quote from @Samuel Guan: I don't know all the details, but your PM response seems weak.Just because the tenant claims something doesn't mean it is true or that they have a valid reason to break the lease.The first thing you should do is verify whether mold is actually present.

Are they verifying SCRA eligibility?

Verifying last 2 years of rental history very important!

If you are happy with the deal otherwise, I'd just get an HVAC company over there for an inspection (should be reasonable), explain the situation, and ask them to verify correct installation of the unit, etc. 

I may be paranoid but it really feels safer to me to see buyer / seller in front of me with the attorney in charge, for some bizarre reason, when a person who had an online $100 or less class to become a public notary has the seller / buyer sign legal documents, I don't feel it's a safe way of verifying their identity and generally speaking I feel conducting these large deals with a table closing when all parties are present is way better.. or at least choose an agreed third party to verify identity of all parties (like a different law firm) is that just me being paranoid or is it a legitimate scare?

2) if you buy the identical house across the street and list it on Airbnb what’s the difference?

Should I call the recruiter/employer to verify employment?

I'm also thinking of building 3 units just like this side by side plus an identical ADU so I can squeeze a 4th unit in if time permits.I have pocket doors between the kitchen and living room to the right.

Verifying last 2 years of rental history very important!

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?