I thought Florida was next to impossible to deal with on cart issues, what with requirements for a commissary etc etc?

Shelby do a search here on Roadfood for Florida Carts/vendors/commissary/requirements. Or go speak to your health department in person about requirements concerning the need for a commissary.

One other thing is popcorn a big seller what with microwave popcorn?

Don’t get the cart before the horse, or you’ll waste a lot of time and money.