Having a deal in hand will always be best when approaching a buyer.Feel free to reach out! 

Can you earn more than the mortgage (net taxes on that money) ?

Investing in Florida, especially in Tampa, is a fantastic idea due to strong population growth, high rental demand, and no state income tax.

I’m thinking about selling one of my debt free rentals to pay off the loan of the new house – thus erasing the $3500/month loan payment.

you can do anything, there is zero benefit in doing this. a LLC is a disregarded entity for tax purposes so essentially you are renting it to yourself so its a net zero.

Feel free to inquire about their staff qualifications if it's a larger organization.2.

They're willing to share it with you for free, so try to find ways to pay them back.

Should they not do so, the hold deposit is non refundable and I am free to rent to someone else after that date.I think in the 8 or so years and 60+ houses I own, I've only had someone back out one time and I kept the money. 

And could save capital gain tax on first 500K profit .

Is it wise to do this and be debt free even though my total payments on those 5 properties will go up $500?