An LLC in a low, or no sales tax state will work well. Me I just bought a PO Box, with forwarding privileges, and for a residence address I use my daughter's. I ran into a few important concerns that needed an actual residential address, and my Montana LLC was not sufficient. I still have it, but don't use it much. Example: We did not sell our home, and leased it out instead for extra income. Our daughter's address is in the same state as our leased out home. One thing about an LLC. Do your home work before picking a company to build it for you. The wrong low costs LLC builder could get you in a lot of trouble when it comes to some states, and federal income tax time. I know a lot of folks who have built their own, so that too could done.
"Full Timer" with "Boon Docking" in the desert southwest being my drug of choice. Well, that and really cold beer.