What do you think of this tunnel design?
I don't know where to buy augur flight locally (shipping could get expensive), but my dad is a welder and possibly could weld the augur onto the 2-ft lengths of pipe that had been driven into the ground (through the baseboard) when this hoophouse was at the nursery. I'd be giving up the extra height I wanted but no baseboards/hipboards required? Looks really easy to move too, just buy more pipe and place it where I wanted to rotate to, pull the "pins" I'd use to secure the hoops into the receivers and move them over to the new site, reuse the plastic too.
Here is a link that might be useful: U of KY low-cost hoop house