She consistently paid rent late, had an illegal guest for the better part of several weeks, damaged the property, disturbed the neighborhood and refused to let me into the property to do regular maintenance/repairs.

The savings is more in the time than cost though so if you want less disturbance on site since you live there, then it might be of value to you.Based on cost, you can use rentometer to see what a 1/1 or 2/1 would rent for in your area (typical ADU floorplans although you could go larger). 

Two things I find disturbing about this:A.

Any disturbance would be rectified. 

@Michael Moskos - talk to the tenant in a diplomatic way, remind him of the policy around noise, and the fact that he is disturbing everyone else, and if he does it again, call the cops and start the eviction process.  

Hello everybody. I have rentals in Florida, Tampa Bay Area. Tenant complained that the wall AC unit upstairs does a loud humming noise. I checked and he is right. The noise is really loud. The owner of the condo upsta...

However I still find your lack of faith in the force disturbing.

Just as I was talking to the owner about having to kick her out because they were disturbing other tenants, they decided to get back together. 

But that is gone now and it has a warning about not disturbing the occupant.

I have no proof but I was certainly very upset and disturbed to find out my house and tenants were not cared for, and felt very much deceived.