Most likely he will be a pain in a$$ no matter what.  

There are so many ways for tenants to stall an eviction; I feel your pain.

Painful to set up, but you'll really appreciate the flexibility, portability, and ease of use.Rick

Getting the key doesn't really matter, since you will be changing the locks, but is good to do for psychological reasons, as it will be a defining moment for her to release her mental hold on the unit that was once her home.  

One thing that wasn't mentioned is that it can be a pain in the butt to close on 40 duplexes vs. 1 building.

Or blame it on the pain meds from the surgery I had yesterday.

For student tenants in our SF we don't allow it and the insurance was really a pain so we did not pursue anything that was an issue for them on the first go round as now we are in assigned risk. 

I would do as many have state already- get the house re-rented and maybe negotiate a hundred bucks or so for lock change/pain and suffering.  

  - I feel your pain. 

It's a pain, goes up every year and with the last two heavy snow winters, we are still paying monthly special assessments.Wish you the best with your deal.