Since you will be full timing in your RV, PROPERTY taxes in any state is not an issue. I assume that you will be traveling rather than just parking in a State and living out of your RV as a permanent resident.
In that case, vehicle registration, income tax, and health care are your major concerns. For that reason Florida is the best choice with excellent health care plans and low cost vehicle registration and zero State income tax.
Since you will be registering your RV in Florida for the first time, you do have to have the VIN verified but in Florida you can have any police officer or even a private Notary verify it. If you drive to a tag agency, they will verify it there. There are no vehicle inspections.