Personally, I would go with double-layered steel-reinforced concrete, maybe with a sandstone overlay, but I would make it so that the stones didn't jut out at all so there would be little to no possibility of damage. I might insulate the gap between the concrete walls, or i might just stabilize it with wood. For the roof, i would totally use unplaned 2x4s to create some really nice bracing which would allow a little room underneath the roof for storage purposes. I would insulate the roof with fine paper pulp or the like, because it's a higher altitude and a colder clime in that part of Utah. Over the paper, i would put sheets of waferboard or some other kind of cheap wood, so that I could utilize the aforementioned storage area. On the outside of the roof, I would have wood sheets or something, with tin nailed over it for that rustic look. Of course, this house would only have 2 rooms, because houses down there are never really big. To be safe, I'll say a bedroom and some kind of living/eating room with a fireplace. For access to the attic, I wouldn't use a bulky stairwell, but instead a cheap retractable ladder which would drop down at the touch of a small lever on the wall. I would have an outhouse behind the house proper, for indoor plumbing would be hella expensive out there in the middle of nowhere. However, I would have electric lights. My electricity-powered items would receive their energy from a large battery, which would in turn receive energy from a heliotropic solar panel on the roof and a recumbent bike, which I could exercise on every morning and power up my battery at the same time. Just in case something bad happens, I would have a gas-powered generator handy to charge the battery. If I was feeling especially spendy, I might have a greenhouse or something where I could tend all manner of extrinsic plants and succulents. I would need a much larger solar panel and maybe an underground well to power the humidifier in such a greenhouse, but it's okay, because I'll probably never build this house and I don't want to live in Utah anymore anyways but I still felt the need to type all this out because I'm bored or something.