My friend Kermit and I built several of these for ourselves and others. Most of the coal-bed-methane wells in northern Wyoming have been de-commissioned; a lot of them were covered with these heavily insulated fiberglass huts, in many sizes, from 5'x5' up to horse-barn size. One or more fellows bought hundreds of these and sold them off a lot in the country. We bought several in this size, about a 6 foot cube. They have an eye-bolt in the top so that they can be moved around quickly with a little flat-bed work truck with a boom. We would nail together a little sub-floor with 2x4s and a piece of chip board and set the hut on top and screw it together. We bought window air-conditioners off the used ads and garage sales, then ordered after-market controllers. Plug it into 110 and let er rip. In about 10 minutes it will take the interior to 45° more or less and hold it there in 100° weather. I can lay three deer or pronghorn onto plastic milk crates in there with a piece of plastic sheeting on the floor, or one quartered elk. They will stay good for days. This one is mine, in the back of the house; I have less than $250 into it. If necessary it can be loaded onto a snowmobile or four-wheeler trailer with a generator and taken into the field.