scottbrrtt72:
Just out of idle curiosity, if you have a problem with water/flooding and shifting/varying ground why would you want a solid (attached to the ground) structure in the first place?
Many years ago I was living along a river with flooding, heaving ground as the water table rose and fell, etc. Almost every rigidly attached house in the area had occasional structural problems (cracked slabs, settling walls, etc). I designed and built several small structures that "floated" unattached. One was a small utility building that I sold when I moved. It was easy to drag over to his lot and the purchaser added a sleeping loft (the ceiling was 12' high) and other "comforts" and used it for years as a cabin (until the marina was converted to a county park and the thing destroyed).
A rigid, integrated structure NOT attached to the ground would be much easier to manage. While it has to be built more solid in itself, you have no cost of foundations, posts, etc. I seem to recall someone said once that a house is just a sloppily built boat that can't be moved and is in permanent dry dock (or something like that).
JEH