Excellent article cited above.
Yep, they'l want you to register your car after 90 days. Also get a FL. driver's license
(surrendering you're old one).
There are very few legal anchorages
in S. Florida - Boot Key Harbour @ Marathon is one.
Many municipalities have very restrictive live-aboard bylaws
ie: Ft. Lauderdale requires FULL-TIME connection to shore waste pump-out at their few legal
live-aboard sites (Isle of Venice & Hendicks Isle - off Las Olas Blvd).
It's getting tough to be a live-aboard!!!