There are cheap ways to live like a nomad. You aren’t going to discover them watching RV YouTube channels.
Newer RVs are expensive to buy, run, repair, and park. Older RVs aren’t even permitted in many campgrounds.
There are cheap places to stay, but there are downsides. Walmart parking lots aren’t places to camp but might be fine for an overnight stop. There are cheap and even free places to park on public lands. You’d better be prepared to be self contained and know how to boondock. Then there’s the issue of driving your expensive RV up questionable bumpy dirt roads. That free parking could get expensive if you need an RV rescue tow truck.
It’s a lot cheaper to live out of a van. You give up a lot of space but you also give up a lot of headaches. Just being able to park in normal parking spaces is a huge deal. Of course, you can go nuts and spend silly money on a tricked out camper van. I’ve seen some deluxe models in the $200,000 range. Then again, there are some nice home built conversions built on cheap second hand vehicles.
Of course, you could just throw a decent tent in the back of the car you own now and go on an adventure. There’s something to be said for just getting out there.