I have decided not to go from south Texas to southern Indiana to get it, but Charlie at puppycreekfarms@earthlink.net has a commercial greenhouse frame with 2 inch tubular steel ribs and vents and fan for sale for the unheard of price of $150.00. The greenhouse measures 18 1/2 feet wide, 8 Feet high and 40 feet long. Its just too far for me to go, but if you are in that area, they just don't get much cheaper than that.

GAry J