Hi Sam, welcome to Garden.org!
I garden in north Georgia, so I can't help with the unique garden challenges of Florida, but I can give you some general insight. I grow both my vegetables and herbaceous borders in raised beds of about 6-inches deep because our native clay soil here in north Georgia is terrible to try to grow in. Raised beds are a good way to incorporate organic material and top soil into sandy or clay soil.
Raised beds could work well for the tomatoes and beans that you want to grow, but corn is a different story. Corn needs to be grown in a square block of rows to maximize the pollination. I used to like to grow corn until I discovered that all the critters used to like to eat my corn. The raccoons in particular would pick the corn ear by ear the night before it was ripe enough for me to pick it. There is also the little matter of the corn worms, which eat the ears of corn. Not only are they disgusting, but they produce a dangerous toxin. I just decided corn was not worth the effort.
Good luck with your gardening! Continue to reach out to this community with your questions. We love to talk about gardening!
