I even had criteria that would get a tenant denied like: rude behavior, came with rude friends, showed up late without calling, missed an appointment, didn't fill out application completely after being asked to do so up front, smelled like cigarette smoke, had filthy car, just on and on. 

Its one thing for an assistance team to be separated for an appointment or something but for a rehab stay?

Have your criteria in writing and maybe email it to yourself, so you can establish a date for when it was created.I also denied anyone who was late for an appointment with me and didn't call with a darn good excuse, like they were stuck in a bad traffic jam - and I verified there was one.There won't be many bad tenants who make it through your criteria, if it's tough.  

That's why if I had good reason to suspect trouble brewing, it would be one approach worth trying.When we do periodic inspections (at least twice a year) and enter the residence, not only do we give our tenants legal notice to enter, but we ask them for a date and time that is convenient for them and set an appointment.

This has nothing to do with financials but I have found that those who are late for appointments (and do not have a REASONABLE excuse for such) are going to be late on their rent.  

simplify your listing, simply put,, add your rent criteria, your credit screening, occupancy limits and simply state you will respond in kind to inquires that meet or exceed the limits you post and that showings are by appointment only, no responses will be made other than business hours... put in what you want if they can't read don't respond. 

Made appointment and met me at house.

He can choose how he wants to manage his property and if that means he wants to appoint me as point of contact..he can do that.

It doesn’t really matter why a reservation is cancelled; there are a myriad of good and valid reasons to cancel a plane trip, house rental, or appointment with your shrink.  

And I could do everything by appointment.