Lots of bum information in some of these responses. I used to be in the domicile/residence business, and I can tell you what I knew yesteryear ain't necessarily true today. And, many of these questions and statements should be prefaced with "generally," which is lawyer speak for "maybe" and "it depends."
For example: "If i own a house in a certain state and dont spend much time there..........." You can own real estate anywhere; ownership generally doesn't prove domicile. "......... spend my time in another state renting..........." If the majority of the time, and other connections are made in the rental state, that generally will be the legal domicile. "I can live anywhere i choose and still do my job." Absolutely correct.
"Your domicile is where your driver's license and insurances are based." Generally, yes. But, it's entirely possible a vehicle is garaged in a state where a person is not domiciled, and has to be registered and insured in the non-domicile state.
I'm not picking on the posters I quoted. Rather, I am encouraging anyone who wants to try to minimize the cost of RV ownership by using an LLC or other tax avoidance scheme ensure they have all their ducks in a row. If your FL tagged RV is sitting in your MA driveway 75% of the time, there's always going to be one nasty neighbor to do you in.
--2005 F350 Superduty Crewcab, 6.0, 4wd, short bed, 3.73 gears
--2016 Montana 3711FL, 40'
--SOLD 2014 Wildcat 327CK, 38'