Are those custom fittings at the top joining two 10 foot sticks? Looks a little more pointed than most hoops I see. I do like the pipe door idea here as it seems much easier than the permanent plywood end walls I typically see.
I'm about to bend hoops for over a 4' wide raised bed. Any scalable suggestions. I'll use 1/2" EMT for this - I'm getting sick of plastic in my garden.
One idea I've been playing with are geodesic domes. So far I've built a few with tooth picks or grill skewers and bits of hose as the hubs. Scale one of these up and you'll have a nice strong green house.