You might be able to file a statement of damage and what is owed with the bankruptcy court.

Hard to prove in court and make it stick.... regular inspections on your part may have avoided it or limited the full extent of the damage.

added value by building out a full functional NY style deli/bodega on one side and updating already established laundromat on other side Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

In addition, we had to Quiet Title (via courts) because TWO of the existing residents in this unfinished subdivision would not sign lien waivers they had against the former developer who left the road a mess - I tried to take the quick route, but they were stubborn and didn't trust me (I guess?) 

It doesn't sound like they will make this right and you may have to go to Small Claims Court where documentation is key.I agree that there will be more damages coming your way.

WARNING: doesn't always hold up in court:(2) Pet Rent: depends on breed, size and rent amount.

Is he running a very established business, lots of web presence, social media, referrals through “next door” type boards, to go after in small claims court.

Yep I definitely get the importance of a note, REGISTERED with the court house thru a title agency and so forth. 

The IRS is very stringent on education and research hours, and have shown in several tax court cases that people who just "manage the manager" will not pass the audit.

@J Newman the BIGGEST challenge we see landlords have with PM software is not having a clear list of function they want and not INVESTING time to really learn how to properly learn the software.Many are looking for an out-of-the-box solution they can just press buttons to use.We've spent 14 years constantly pushing the envelope of what our software does.