Found this -- as often happens -- while doing a web search for something else.
(Photos are from the article here.)
It's called the Neverwas Haul, and is "a self-propelled 3-story Victorian House", according to its website.
Here's a music video that takes place in and around the Neverwas Haul -- so it serves as a bit of a tour. The song is a good song, too: "The Land of Lost Things", written and performed by Renee de la Prade.
The Neverwas Haul was built by members of the steampunk club Obtainium Works, in Vallejo, California.
I'm not into travel -- but for **this**, I would travel. According to the website, they rent it out: I just want to walk around in it...