Job market is good in central and south Florida, I don't know about the rest of the state. A good Tech will have no trouble getting a job. A good Tech can get $18.00 to $ 25.00 an hour. I don't know how this compares with northern pay. There is very little union work.
Since there are not many heat calls it gets a little slow after October until around late April.
95% of work is split systems, very little gas or oil. A lot of heat pumps north of West Palm Beach(not needed but energy code did this).
In south Florida you will need to get a journeymans card( have to pass a test, some county and city requirements).
As a contractor( I came up through the ranks) I perfer a Florida trained tech.
My reasons: we work under strict building codes, some techs cannot adapt to all of the inspections. Most work is on home A/C split units. We use 99% duct board and flex, very little sheet metal.
From my past experience with hiring northern trained Techs you are in for a shock. We don't do it the way it is done up north.