I know what you feel. Twice I ran away and the sense of freedom is hard to explain; it kinda corrodes the mind when we come back to the 'normal' life. It's doable to live as a backpacker, though it's tiring. Same for cycletouring.
I've been thinking about moving into a pickup truck. Your rig looks perfect for a long therm experience. The only thing I don't like is dealing with regulations, taxes, and all the other bureaucracy of having a vehicle. Plus the gas cost involved. If 4x4s were super cheap over here I'd definitely be out there already.
There's a lot of cost for sure, and here vehicles are probably more costly in comparison to many other countries. It's my passion though, getting into the wilderness and it's the only way it can happen so I have little choice. I enjoy it so much though, it doesn't seem to matter how much it costs and it repays me over and over by being there, out in the wilderness.