Mr.MEH said "And it would certainly be a great chance for people to grow their own food if you open it up for garden space. However, you should definitely look into insurance. Subletting your land opens it up for income, which means your insurance situation would now change, and you would absolutely want to make sure you are set up with a business license along with separate insurance to protect your personal liability from any business losses in case of legal issues. "
This would probably mean business insurance. When I looked into setting up storage for rent, the cost for insurance was more than I would have made for the storage, so it wasn't worth it.
You do have a great idea. Good luck.