Thanks for info.urs is bout exactly what im building .i did some dozer work for local high school on there new ball field. They gave me all the old galvanized posts .most 12ft long. Using them for most frame work . Rest be wood. Other than that mine be just like yours. I got one the water tanks like urs. My brother has two greenhouses. Has been a big help for us that have garden. We start maters an peppers in feb here in north al. Transplant when garden time gets here. We gotten kinda popular around here. Everyone wanting us grow plants for them. Hoping have my finished in couple weeks.i can t wait. Seeing ur pics is a inspiration for me.