I was wondering what was to be with your project. I'm thinking of doing something similar. I'm starting the other way though. I think I've found a decent Hino Cube van with a 3.8 diesel in it. I plan on using it as a toy hauler and adding some creature comforts. I should be able to salvage RV appliances from older units.
I like the wood heat idea. That could be toasty, even in the winter. One more thing for "The List".
I also though about picking up a 51' van body trailer. They sell for around 2500 at auction and would provide a lot of space. Can't really park them in too many places though. I would just rent a single axle day cab when I needed to move it.