This design has worked well, I really enjoy the shape and how it's laid out. I really wouldn't go any bigger than this since the sphere starts to get really large. Also, from a commercial view, it's impractical since nothing is nice and square which makes it difficult to have "production line" style growing. We're currently in the process of setting up a new 26x144 greenhouse. This is a traditional hoop house....just far more economical to set up. You can follow along at www.youtube.com/web4deb. Thanks!
Redneck Backyard Zamboni Ice Resurfacer