I'm in NC myself. You shouldn't have major concerns with holding it up with foundation, but holding it down. Those buildings can become kites. I would have it set level on top of 4" solid block, leaving most of block outside the bottom rails. Anchoring it down with supplier rebar stakes, they hold surprisingly well. Temporally fill with stone. Later own you can grade out the gravel and you're ready to pour concrete. Still your rebar anchors will be in concrete as well as the ground.