I dug the hole for the concrete pad, made a form, made steel reinforcements out of rebar and scrap metal bed frame, pounded two 18 inch bed frames into the ground and welded the steel rebar to the stakes.
All I need to do when the unit comes in is open it up figure out where the holes for the feet are so I can weld up 4 stainless steel bolts to metal straps then weld the straps to the steel base.
This might be over kill.