Yes, FL is inexpensive annually. If you've owned your coach for more than 6 months FL does not charge a sales or use tax. The initial registration includes a one time tag purchase fee of $200.

Other things to consider. Make sure the state you choose doesn't have annualy inspection reqyuirements unless you want to plan your travels around those inspections. Check drivers license requirements; you may have to take a test! Carefully consider the risks of registering your cosch as a company coach. Many take this route eventhough I'd suggest there are some risks. In many states a commercially owned coach would require a CDL.