This is probably besides the point, though.I'm talking with a couple lenders to see my eligibility, and one has told me that fannie mae and freddie mac have become more stringent in address listings: they won't allow me to use my address in Florida since my tax residency is in Shanghai.

SF tenant protections are very very very stringent. 

Regarding your questions, in our implementation the application of the binder as a credit towards rent is covered in our General Rental Binder Policy (this document is on BP via the link I posted) and in a document specific to my company (also specific to the property) that I did not upload.

I’ve had good success renting through stringent screening process and providing a good product. 

With that being said, we do vet them stringently, and hold them to a standard we do for market rate.

Insurance - ValuePenguinRent control - Some states and metro areas have implemented various kinds of rent control.

**Minimum Stay Requirements:** Implement minimum stay requirements to ensure longer bookings during peak periods.

There might be legal repercussions if you try to submeter or implement RUBS.

I'm running out of ideas on how to find out whether I'm eventually going to be in trouble if I implement a water bill splitting process (or system).Appreciate any insights.

Often the process/requirements for condos are controlled at a State level by your states subdivision map act (or the equivalent) and then at the local level they implement the requirements of the subdivision map act and physically approve your project.