Thanks to everyone for all of your excellent feedback and advice. Here’s an update:
I got the lawsuit filed against me. Lots of scary stuff. They are alleging that my PM broke the law in accordance with fair debt collection practices. Huge penalties. I have no idea if any of this is for real, but the lawsuit states that I am liable for all of this. It is very possible that my PM did everything completely legal and above board, and this is just a scare tactic. Or maybe not.
I started by making an offer to the tenant through her lawyer. This is against everyone’s advice, but I thought I would give it a try. The offer was:
I will forgive all past rents, late fees and penalties. We will start with a clean slate in March with the current rent (which is about $300 below market). In return, she will drop the lawsuit with prejudice.
The tenant rejected my offer. She wants me to pay her $2500 to drop the lawsuit.
I hired a local attorney who specializes in landlord/tenant issues. He told me that as long as this is handled in small claims court, his one flat fee will cover it.
That is the update for now. I will give another update when this is resolved.