It cost me $4. True story. Here are the materials: A pallet that I broke apart (so that I could use the individual boards) for the bottom frame - free from freecycle A recycled billboard (whole thing is 48'x14') to cover the roost area - free from a local billboard company. The guy even delivered it to me because he thought it would be too heavy for me to lift. Incredible! Plastic chicken wire to cover the run- left over from my chicken coop, originally purchased new Metal tent poles to support the billboard and plastic wire - free from our gazebo that collapsed under the snow last year Piece of square PVC pipe for the roost and a small round PVC pipe for an upright- left over from the coop but originally purchased from Habitat ReStore A gazillion zip ties - $4 for a pack of 100 Total = $4!!! Side View Roost-end view View into the roost area from the run end There are some obvious characteristics of this tractor that would not work for everyone. First, it is not predator-proof. It is housed in my backyard which is fenced and protected by a dog. The tractor is enough to deter hawks and a curious dog, but would not hold up against a raccoon or fox. Also, there are no nest boxes. I built the tractor for my 4-5 week old chicks. I needed to get them out of the house but didn't want to put them in with the big girls. Finally, it is only meant for warm weather. Obviously. Look at all that wire!