The place its going to be sited is not ready & prob wont be for a year or so.
However I would like to start using it.
Would I be crazy to bolt it to a couple of 4m ish RSJ's / UB's (or oak beams) & then sink them in trenches to bring it back to ground level.
It has a center section that stops the uprights pulling in so resisting twist should not be an issue.
It only has 3 bolt down points on each side as per the picture.
Most of the use is to change wheels / do brakes so the car does not go that high & high use could be restricted till its fixed properly.