I'm not running a charity. 

Hey @Charity Daniels yep - as long as you register for it, you'll get a replay link the next day! 

This is a business, not a charity.

If you want to be nice, give it charity

@JD Martin  @Russell Brazil  this is just someone who has no clue as to what the legal process's are and what it cost.and to get a court ( and only a court ) can reverse a sale would cost probably as much in attornies fee's as the equity is worth if not more.. better to donate that time and money to a worthy charity..

Did you buy the building to run as a subsidized housing charity?

My why is to be able to positively effect thousands, if not millions of lives through employment, positive living experiences, education, charity work and giving back monetarily. 

If I was looking for a tax break I would donate to charity  or increase my Ira contribution.

You just have to contribute $20 or so to some charity to join..Banks are itching to get higher-yielding assets than the paltry returns they're getting in MBS and bonds, so I'm sure you can find someone if your credit and CF situation is good/decent.

Bearing that in mind, I'd terminate their lease and find a nice spinster that quilts for charity to fill the unit.The more rentals you've had experience with, the greater the odds that you'll run into some sort of problem like this, its just a matter of time.