In addition, lots of areas are specifically outlawing doing this. The usual suspects, boomers, are to blame. Apparently, an RV set up on a relatively undeveloped plot of land affects their property values, so lots of areas have zoning ordnances that forbid you from living in one full time, even on your own property. No joke, I've heard of people getting slapped with massive fines and being told that the RV had to be moved/vacated. Even people midway through building a proper house and just living in the RV in the meantime have been affected by this. Heavily research the county you intend to move to.
Also, lots of forests are setting in hard limits where you can only camp at campgrounds for a set amount of days before you must move, and some require you to leave the forest to reset the limit. This also makes RV life difficult.
Realize that if you live in an RV you are technically homeless in some areas. It actually qualified me for financial aid in college. It doesn't matter that your home is nicer than most people's apartments and you actually own your dwelling, legally you don't own a house on your land, and you don't rent an apartment, so you're homeless. Leads to a lot of pain in the ass technicalities. I remember trying to get a P.O. box was a bitch.>Hi I'd like a P.O. box please>Perfect, we just need a physical address>Don't have one, that's why I need the p.o. box>Sorry, we can't sell you a P.O. box without a physical address
Similar issues with drivers license, mailing packages, etc. You'd be amazed how much the government hates you when you don't have a permanent address.