They’re really simplified the modular, moveable, quick up and down greenhouse. Season extension has always been a challenge for us on an urban farm, so poly low tunnels have been our default for many years. We still use them a bit, but they just don’t handle the heavy winds and snow loads like these do. The way we have these set up at Green City Acres is a 50 foot tunnel with the end bows running at 45 degrees. This is the create an end that is short and fits compactly right into our urban plots. I even put one of these in my front yard this year. We also have each tunnel set up with micro-sprinklers, so no more having to hand water in our low tunnels. This was a major time saver this year. It is possible to build your own caterpillar tunnel, the components are very simple, however, I do prefer to just have everything show up at my door and Farmer’s Friend have really made the price so competitive, that I’d rather just order and have everything I need show up to my door.