I built this 12x10 tractor using 2x2 lumber and 1x1x36 hardware cloth. Four 7" lawn mower wheels for easy (ish) moving. The roof is 6' high. The 2x2 lumber saves enough weight to make it possible to be pulled on grass using skinny wheels. I will probably change the wheel system next spring. There were 16 large white commercial turkeys in it until week 13 when one was attacked by the other 15 and had to go to the freezer. They will be processed at 17 weeks.