But since the rentals are on my tax returns, of course it's factored in when getting a new loan. 

Since FL doesn't have an income tax, go with a MA accountant. 

This is synced up with Turno (Automated cleaning scheduling) and Price labs (Dynamic pricing). 

Tax.  

Any other surprises such as higher tax rates, preservation requirements, flood insurance, etc?

The seller needs moving money, there are oftentimes an arrears that has to be paid on the loan, there are oftentimes HOA fees that are due, there are title costs, there are escrow costs, usually there is deferred maintenance, you have to make mortgage payments out of pocket until you get a renter in there, you have to pay utilities and taxes, and you need reserves in case it all doesn't go as planned.3.

Since land values tend to be higher in the resort areas, that can have a negative effect on tax benefits.

Vacasa Guestworks(partial MGMNT model) says their fee of 12% is almost covered by the fact that THEY will pay the Airbnb host fee   Also they will handle the tedious filing of monthly taxes as required by my city/state regulations  I’m not scared at all to handle the online listing and am not keen to pay their 10-12% fee.

And tax reform in those days just hammered them and then N.

It's tougher to makes those BRRR deals pencil in TX because of the properties taxes and insurance (also HOA's since you're in Houston).