These have adjustable bolt on feet, no need for foundations or permanent mounting though they do have holes in the feet if you did want to bolt them down.

There are 4 lifting points installed to make it easy to move these with a crane or Hiab without the need for a spreader bar.

These also have forklift slots so you have more than one method of moving them around on your site. The chassis is quite substantial and you could bolt an axle and drawbar on them if you wanted to be under caravan/tiny home rules. Picture is of a 3.93 size unit underside.