Its going to be in the same place for the foreseeable - (until the other half decides she wants half the garage for something)

I was thinking of using the pad to build the frame sections on to make sure they were flat and true (more so than garage floor!)

Then assemble to whole thing on the pad and bolt it down.

How thick would the epoxy need to be? I am just reverting to cost here probably be able to deal with a slab as I can get all that on trade no sure I can the epoxy! heres hoping though :)