You should consult a real estate attorney or tax advisor to handle the legal and procedural details.From a tax perspective, there are several implications.

For instance, what are the rules around security deposits, eviction procedures, or property maintenance?

This is something their screening probably would have caught, or their system would have a legal procedure to deal with it.

I used sankeymatic.com after a bunch of massaging of the numbers in a spreadsheet. 

Specifically; rules, regulations and permitting procedure.

Get some policies and procedures in place.

Just document the current condition before the cleanup process and follow any other local law or procedure that is in your municipality. 

Then start following the procedures for your area. 

Well I called to complain and their response was that this is their standard operating procedure and they would not have shared my private financial information if I had instructed them otherwise.WOW...just...WOW!!

They don't understand how to price effectively, study the market, set boundaries with tenants, establish policies and procedures, communicate, and dozens of other things.