I just stumbled across this. Jim Tolpin is a woodworker, author, and wainwright (wagon/vardo builder) in Port Townsend, Washington. He's built some pretty sweet various over the years. He's got a PDF available on designing and building a vardo.
https://www.byhandandeye.com/building-a-gypsy-wagon/
https://www.byhandandeye.com/product/de ... psy-wagon/
This is one of his vardos.
