The buildings were bought in winston salem we had steel floors welded into the bottom for durability . The 2 buildings painted inside and out with the steel floors were 9k. We are using one for burning the other will have a search / rescue maze constructe d into it. We did all the fab work such as adding the 36" doors on the sides and had a local company fab the sprinkler system and we installed it. we took a 250 gal old oil drum and cut it to make a fire pit and built 4x8 walls that can be positioned where we want them. We have used these buildongs several times and are very pleased with the performanc e of them. We bought 3 thermal probes with displays for under 200.00 and mounted them in a box to monitor temps at ceiling middle and floor. We will be cutting in a window soon for ventilatio n and are working on getting a ventilatio n prop. If you would like to come check out the buildings let me know we can set something up.for the money it was a excellent investment and has so many posibiliti es... We use it even though the ban is on. The good thing about these containers is they can be stacked we will add on as funding is avail. I can vouch that when ya use cardboard and pallets that thing gets hot and ya cant see ya hand in front of ya face.