If you want them out no matter what, then don't renew the lease.If you're ok with them continuing their behavior (because they will), then increase the rent.

Yes, it sucks to pay off a PIA ex and reward her bad behavior, but in the end it may be the cheapest, fastest route.

It is not their place to allow(or disallow) any such behavior.

Really erratic behavior and for the most part, almost following the same trend as the rest of the US.  

I don't reward bad behavior with financial windfalls.

What drives renter behavior? 

If I were to base my RE investment choices solely on hood properties, I am essentially transferring a portion of my success probability on to the behavior of people in the hood. 

You could also remove any locks between the basement and main house or the downstairs bedroom if they exist to discourage this behavior.  

Give you the wherewithal to pursue and achieve your long-term goalsMany investors start off "too hot", and they either overdevelop their first property or they spend their money too fast: either of these behaviors will stop you dead in your tracks, and you probably won't even be able to achieve your short-term goals - and you certainly won't have the resources to pursue your long-term goals.

Do not reward this defIant behavior and offer cash for keys , that is a hail Mary last resort . iN the sprirIt of tryIng to save money In an evIctIon , I’d make one last phone call to the tenant and explain that you are going to march down to the magistrates office and throw them out unless the animal is gone by the following day .