I have a number of specific issues with wofati. Like many ideas over at permies, it seems powered by woo and good intentions, and shored up with a huge dollop of stoicism. It seems better than a tent. If that's one's point if reference, I think it's pretty nice, but that can be a hard sell in America.
Though I could be just as wrong as folks who come here and claim nobody could live comfortably on a JAFI.
But I can think of workarounds for those shortcomings, if you want to spend the money, and do the work. Wofati seems optimized for minimal cash outlay, but that introduces some limitations I'm not comfortable with.
If one is concerned about ground shifting, building adjustability into the design is the way to address that. This isn't difficult. But it can add some expense.
But first I have a few questions.
How much will premix concrete run you? The further it has to be trucked, the more expensive it will be. And how far is it?
How far away is the nearest quarry, and what do they provide?
What are your soils like?
Are you building with cash?
Are there access issues? Could a semi deliver a 40' container to you and get back out?
Can you get heavy equipment on site? A backhoe or mini excavator should work.
How much of the build are you planning to do on your own? Or more to the point, are you planning to hire any work out?
How much of your land are you willing to clear?
How much direct sunlight do you get in the summer?
Where does water drain off the land, and where does it come from?
Speaking of water, if I remember right, water was a problem in the area, how are you going to address this?
And that's probably more questions than you wanted to think about at this stage.