Here's a link for you. Scroll down to the question and answer section, I'm sure you will find the info you need.
How to Register Your Out Of State Car in Florida – eTags – Vehicle Registration & Title Services Driven By Technology
You can register a vehicle in Florida even if you just have a "vacation" home, I know of 2 snowbirds that have done it, and keep the vehicles here
It's still best to Call DMV to talk to a human.
Steve