Have you thought about using shipping containers? I have turned containers into many things and I’m currently building my home out of six 40’ containers. 20’ containers don’t have wheels but they can be moved. They are relatively inexpensive, secure and can be built into your home one at a time. I am currently living in a motor home on the property that I purchased to build my dream home (the six containers with my greenhouse on top). Over the past couple of years I have turned 20’ containers into a kitchen box, pantry box, toolbox, laundry box, gun box, etc. I built these with the idea of eventually connecting them together to create my complete home. My plans changed and I decided to use the 40’ containers and build a modified EarthShip design. If I was to do it again I would use 20’ers and build my house one box at a time as I could afford, I would not bury it (mine is dug into a hillside with a 6” concrete slab on the roof = $$$$ and a pain in the butt). Keep it simple, use spray foam for insulation and design the layout of each box so they can eventually be connected.
