Trooper,
Yep, I know the type. I've had to PAY these people to GTFO...er.. to leave. I've had to forcably evict a few in my time. I mean jeeze people....
I have an agency take care of it, any issues liek this and they PAY for it, not me. Lawyers have come after me before and I counter sued and they ended up owing me (because they knew their client NEVER signed ANY agreement). Squatter? No, not if its less than 30 days usually, then I have to sign an agreement and then it takes up to 2 months to finally get them out!
I guess i'm just superised that it would happy in such a heavily populated area as well as an area that would generate VERY decent income.
good luck
-bix