Not many boondocking places, in the high season even less. From Ocala south to the Orlando area you can find spots for less than $500 a month. These will be away from major metro areas and you will have to pay your own hydro (see I speak Canadian). You can also find upscale places that will be over $1000 a month, pays to shop around.
Our 1st year we picked a place in the middle and used it more as a base. We ran a lot (5,000 mi for 3 months). I know more back roads than some of the locals.
There are plenty of spots. In our area a couple of places close to each other that have 500 sites each.