First off, I don't blame you for wanting to leave the Midwest!! It kinda stinks here... but at least the weather is finally "half-way" decent! lol
Second, I'm from Florida and will be *hopefully* heading back there in a few weeks. It's definitely my favorite state ever, but as far as moving there to get rich... yeah, it would be a stretch and a HUGE amount of luck & chance! If you detected the beaches persistently every single day with a good detector, then you stand a very good chance to find lots of nice and possibly expensive jewelry. But in no means will you ever make a "living" off of the hobby. Even if you had hundreds of thousands of dollars to purchase your own boat and gear to hunt the waters for shipwrecks, again it's nothing "promising" that will be guaranteed to net in a fortune.
This whole thing is basically a fun & rewarding hobby, but you'll be lucky to find items (i.e. expensive diamond rings, necklaces, etc.) that would pay off your detector & batteries. Then you've got gas prices, which you'll probably never pay for by treasure hunting. lol
But treasure hunting is definitely fun & relaxing, so if you have the chance to move down there and detect every day and still be able to afford to live down there, then DO IT!!!! I'm sure you'll probably never regret it, until we get a good hurricane that is.
Bran <><