Florida sales tax varies from county to county. In Broward County the sales tax is 6%. In Miami-Dade and Palm Beach County the sales tax is 7%. The state sales tax is 6% but allows each county to add 1% to their sales tax. We in Broward County keep voting NO on the extra 1% or penny tax. When you purchase your RV in Florida you pay the tax rate for the county you live in not the county you purchased your RV in. My vehicles and RV are registered in Broward County so I paid a 6% sales tax on them at the time of purchase.
Property taxes and homeowners insurance vary by county. In central Florida and north Florida the cost of living is much cheaper then south Florida. The key is to live close to hospitals and were there are no jobs so, only retired people will move there.
Florida has no state income tax or special tax on RVs or Yachts. Just renew your plate every year for $30 to $100. The rate is determined by the weight of your vehicle.
If you want to live by the beach or on the gulf course then you are going to pay more.