I live and work and in the Miami/ Fort Lauderdale area and would love to meet up with you. There aren't any Rev flyers nearby (except for a couple of guys that I am teaching) so I could use the company. I agree that 75' to 80' lines are about the longest you can expect to fly, especially during the tourist season. I've been flying with 40' lines most of the time when I go to the beach. There aren't any regulations about kites that I know about but showing courtesy is always best.
Maybe good for ya or maybe not but I just relocated to Miami Beach and need to get the area on the Rev Map so lets get out and pound some sand!
I'll pm you my info but t be prepared......................heheheh!
Also, you should try to get up to the tampa area and fly with the Kiting Tampa Bay folks. Theyre a great bunch and love to fly at a moments notice! For example, 2/8-9/14