I am in N. Central Fl. too, not far from Seloc... Depends on what kind of board you need / want also. Partial board, where you feed, clean etc is pretty cheap around me. About 100 -150 a month depending on if you furnish your own hay/feed or they do, if you want pasture of stalls... Full board can range from 225 to 550 a month... Some have turn out, some not.
Uncleared land is going to be about 20,000 and acre or more depending on how close you are to a "city".
Hey, my place is for sale

Comes complete with house DWMH, 5 acres, 1/2 cleared and partilay fenced for horses... I am 5 minutes west of I95
Horse prices here are reasonable, depending on what your looking for...