We love our quirky, slow 1993 Mitsubishi JB500 campervan (https://www.instagram.com/finnthejb500/), but the experience is not for everyone. We were able to register it in Washington without too much hassle. It definitely pays to do some research and try to find a local-ish mechanic willing to work on them before you make the purchase.
Is that an unusual campervan to you? To me it looks like the most archetypal standard campervan there is. I've seen tons somewhat like it, although this looks like a particularly nice compact model.
