Florida...?
My opinion, I think you Brits have only one thing in your head - Orlando...
Probably the most expensive area in Florida, Disneyworld, Universal Studios.
By far, MIA, FLL and W Palm Beach are much less expensive. Food/hotel.
Same situation in Tampa/St.Pete/Ft.Meyers... Much better than Orlando.
xxx
There are seasonal differences too. The "Snowbirds" in winter.
December to Easter, Canadians invade cheap motels/rentals.
Outside that season (summer) - prices go sometimes down to one/half.
Orlando remains high through the year, due to amusement parks...
Many more airplane operators in MIA/FLL etc. More competition, lower prices.
xxx
And the weather North or Central Florida can be cold in winter.
MIA/FLL has generally much warmer weather.
Airplane rental is not the only expense. Meals and motels are too.
xxx
Happy contrails