When we FTd we used SD as our 'domicile'
Insurance coverage was with National Interstate and was a 'Full Timers' policy (same kind/type of coverage one would carry on their S&B Home)
They also covered our truck.
After several years we thought about 'moving' to TX
Contacted our agent and asked for quotes ----same coverage just a change in address (using Livingston Escapees Mail Forwarding )
Increase in premiums was:
50% on 5th wheel and 100% on truck
We didn't move
Costs associated with moving
New Drivers Licenses, vehicle registrations, vehicle insurance, fees for mail forwarding service, change of address on ALL documents etc.
A simple call to current Ins. Agent will get you premiums for that change of address.