Hi,
I am currently training in Vero Beach and bought a $1000 car 5 weeks ago.
If you don't want the hassle of getting a Florida drivers license, you don't actually need to bother in order to get insurance. Go through Progressive to insure your car and they will allow you to do so with an international driving license.
If you buy the car at a garage, they will sort the registration for you and it costs around $180.
Hope this helps
Matthew