This is how we modified your plans. The project was built on the school campus then transported to the final site. We made this in frame sections and then assmbled with let in bracing to give ridgidness to the structure. We coverd with corrigated metalm and corrigated clear PVC glass. THe edges were covered with 2" x 2" dripedge. We will set it up on block and fill the middle with gravel to support water runoffand to give a solid walking surface. Our goal was to make a good quality movable greenhouse at the lowest cost possible.
Notes: If i was not concerned about cost, I would have used cedar 2x4 and would have used a heaviedr guage metal and glass. these two changes will raise the cost to around $1200.00