And it's not expensive. Personally, I spent less than $25k on a DIY RV, and that included solar power and a new motorcycle.
I wouldn't say that I'm happy - it's still harrowingly lonely. But I'm less unhappy than I was when I was working in a big city. There's something calming about nature, and the US is enormously beautiful.
And I think that, ironically, there are a lot of people like me out there. People who feel disgusted with our current culture, who don't judge new acquaintances by their mutual friends list entries, and who are genuinely interested in improving the state of the world and the experiences of the people around us. But we have no way to connect, so we wander off and bide our time in the vain hope that someday we will find a world ready to accept us. Until then, there's really nothing to do but smell the roses.
One thing I didn't see called out is how often you'll be without cell signal, but I've only skimmed the article so far. I'd recommend getting a satellite beacon if you decide to do this, if only so that you can reliably get weather reports and send messages in an emergency.