The only materials I had to buy were hardware cloth, 2x4s & screws. That was around $130. Most of which is the hardware cloth. We've got foxes & coyotes around here, not to mention the hawks, raccoons, skunks, opossums & stray cats. Hardware cloth was a must. The bottom of the run is a piece of chain link fence so no one can dig under. Once they eat up all the grass I will put sand in the run. I also have another coop & run which I use sand in. I bought 3 tons of sand for $50 which is enough for both. The playhouse was given to us.