The owner of the home and landlord, Tomas Arnaiz, has been charged with producing obscene materials, reproducing child porn, and filming a minor.

Stop looking for the perfect note; you're not going to find it and if you do, someone with more experience / faster due diligence will scoop it.So my advice: Find one note seller outside of the exchanges, see what they have and buy one note.

Blah blah blah, the tenant made an excuse and said they shouldn't get charge etc.... 

I do not charge them or collect the money so I'm out of the equation.My 2 cents

With regards to rental income, these ADUs are a niche market, and you can charge about $3/s.f. to $3.50/s.f.  

This might move faster than waiting for him to die. 

Might be different in Maryland, but in Florida I'd probably charge $200-$300.

I apply first come/first serve to receiving a completed application, not a showing or a phone call.To manage my time, I don't charge for the application and therefore, don't show without it being on file. 

Ive heard the Streamline is a faster process up to $30,000.

I am not sure you can charge one dime for repainting.