Well, many things comes in mind, as I did a similar move 8 years ago; from Montreal to Tampa.
1) Get ready for a pay cut (on the other side, houses are still at decent price and no state taxes. My townhouse is for sale btw....
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2) What's your specialty ?
3) You want 3 seasons or 2 ? Jacksonville will have a good 3 seasons, but lower than Tampa/Orlando, you're looking at 2.5 seasons.
4) Personnally, I don't think I could afford to live in the Fort Lauderdale/Miami/Boca Raton area. Make sure you look at the cost of living over there compared to other regions like Tampa/Orlando/Fort Myers. You might never be able to own a house in Boca Raton and only make 10% more than the Tampa area.
5) I'm not sure about the other areas, but in Tampa, the market is mostly through consulting companies.
6) what's your sector; if banking and customer service (from an IT perspective); then Tampa might just be the place for you.
BTW : moving from a metropolitain town to a southern state is not easy. Be ready for some kind of cultural shock. Florida has been growing REAL fast in the pas 5 years and the best is still to come.
And concerning real estate; when the market crashes in the most saturated (over valued) areas of the US, Florida won't feel the effect as much. There's 1000 new habitant per day in FL; which drives the demand for real estate. This number will only go up as the baby boomers retires.