For me, it takes 7 months for a patch of grass foraged on by birds to re-grow grass. So if you like the idea of the quail tractor, then you'll have a dirt spot if you let the birds forage too long in that spot.
Normally, its good if you get pairs (ie 2 males, 2 females). Although, some places you will see 3-4 females per male. It's better off with pairs.
Egg production is minimal since quail are proficient layers (every time they lay an egg it's a HUGE strain on their reproduction part).
I do about 1-2 square feet per quail. It's good to give them space.
It depends on your liking, but my quail love sand. Wood shavings get stinky FAST and my quail prefer sand. In my experience, quail refuse nesting boxes and just lay in the sand. You can collect eggs by just going in their run and having a mini easter egg hunt. If you don't free range, it will be easier to find eggs.
I use a metal roof, but I don't know about Florida. Probably something weather resistant I'm guessing.
I check my feeders and waterers daily.
Tractors are on the ground. Hutches are raised.
Hope this helps!