The following is most of the car hire companies in Florida that you will be able to choose from if you decide to book your own car.
The following numbers are within the United States; however, you can book on line with the ones that have websites. Most are available at the airport in Florida you land at.
Car Hire Orlando and Florida:
Most cars you rent will be Automatic cars i.e., no clutch. You will also be driving on the "Right", which for UK residents may cause worries, you need not though, as driving in Florida is easy.
Most Car Hire companies have hidden extras, no matter where you go. These can include additional insurance, excess fees and large deposits, make sure you check what is "NOT INCLUDED", Pay close attention to exactly what you have bought and whether you need addition insurance coverage. I have personally seen a family get ripped off for $600, for damage to tyres.
Take your own Sat Nav and Dashcam with you, you will thank me later. Make sure you remove when the car is NOT in use.