During hold-over, I may start billing the tenant double the per diem rent rate. 

So just to clarify, they may charge to come out and then send another bill to get the stamped paperwork.

If the house is dirty in which it attracts pest, they your tenant is responsible for pest control and damages as I'm sure when the house was leased it was "pest free" If they flip the bill for it, which you have every right to expect if it's clear their mess is the problem, then that might give them incentive to clean up.

@Bill O'Donnell I've worked in the insurance industry and have only dealt with TAPCO and Loyds of London for surplus lines.

That gas bill can wipe out more than your monthly revenue over the winter.Are you in a high tax area, like Cincinnnati seems the be?  

Don’t care who did it and why, get rid of it.Now here’s the kicker, if you or your repair or maintenance people take care of it, they can report everything to you, which helps you prove the tenant is at fault or caused the problem, so then you can........hold your horses....hold your hat on...bill him!!!!!!!

They may get a partial refund or they may get a bill.

when you pull the information on the properties look for a tax mailing address that is different from the subject address this will let you know the building is not owner occupied, it will also give you the address that they are receiving the tax bill at in most cases this search will also yield the name of the owner. 

I an thinking that using the parent to pay the bills, taxes, insurance, etc will give me another level of distance in case of a lawsuit. 

While there are bills that are trying to be passed to increase the responsibility of owners, they are currently decent to investors.