Buying a motorhome in a different state for a full timer

You will need when you sell to establish a domicile somewhere. If you sell your house and have no address to mail anything your drivers license insurance etc are all a problem aren’t they ? So more issues than buying a coach
Establish a legal domicile FL SD orTX are the common ones. Or perhaps you “stay” in MA
If your financing any part .. buy before you sell the house will save a percent or do on the rate .. full timers get higher interest rates.