We charge $200 non refundable fee for each pet dog plus $50 for 1st pet and $25 for 2nd pet. 

I think that recovering lost pet rent is water under the bridge.

You are entitled to possession as soon as you receive the tax certificate. 

On the lenders title policy is an exception "Rights of claims of parties in possession not shown by the Public Records" which Sally was in possession of the property at the sale and the seller was basically fraudulent.I'm surprised the loan title policy had the exception for parties in possession in it. 

I know many people would not agree, but we also chose to allow pets with a hefty pet deposit.

Do you get a benefit for allowing the tenant to have the dog, such as a pet fee?

We have gotten Quit Claim Deeds from the former owner, or filed Quiet Title Actions if former owner was not found or decesed, and we have also owned for over 21 years and claimed adverse possession.

We have tenants that looked good on the application and background check that when they showed up with pet in tow (no pets allowed), 10 relatives and vehicle filled with trash and cigarettes in everyone's pockets that we knew this would be a problem lease. 

In terms of a money judgement, I would be much more focused on getting possession back.

I'm pretty sure every cleaner everywhere hates making bunk beds, as that adds time and complexity  There will be extra hair and possibly more if you allow pets.