Tell us about yourself!
If you are in the US, check out government liquidation sales. I've bought M101a1 trailers and out fitted them for sale with off the shelf camp items (including a roof top tent) for less than $5k rolling. Shower, toilet, solar, storage, etc. can all be had off the shelf these days. No real need for the advanced fabrication skills shown ion this "tut", although some bit of ability does come in handy.