House in Nevada

I am planning on building a unique house in Lovelock NV, the house will be essentially just a rectangle concrete basement with the south wall being less buried to about 2-3’ so that there are large windows on the south end with planters underneath most the windows, and insulated metal shutters that can close over windows to insulate them, or louver out to provide shade, also very strong to prevent damage to windows from winds, vandalism etc.. and the other three walls are mostly burmed in. I want a waterproofing membrane on the outside of the concrete, perhaps even a membrane with some built in insulation on the outside of the wall, and just stucco over the interior concrete walls. the whole house will only be about 600-1200 sq ft. not exactly sure yet, it depends on the price, 9’ walls on main level, and it may have a small usable attic as a second floor, but I would like a green roof, on the roof, so I think the slope of the roof will be a relatively shallow slope, so there might not be room for the attic space, so it's mostly just a foundation with a green roof on top.

Electrical: All solar, probably only between 1-2 KW system, and as much DC appliances, and lighting as possible, inverter, battery charger, several batteries.

Plumbing: Rainwater collection, 10-20 thousand gallon fresh water storage container, overflow to a 20-40 thousand gallon fresh water pond made with a pond liner, water filter, and possible distiller on kitchen sink, greywater irrigation, Composting toilet.

Appliances: Heat and cooking will be provided by a wood burning cook stove. Part of the heating is the south facing windows. Also a solar oven in kitchen under a window or skylight will be used for most cooking. for AC there will be a cooling tube, it’s a tube laid in the ground for maybe 20-30 feet, and then an opening, and then some type of vent or high window that can open, and the air will go through the tube, and out the high vent to cool, most of the cooling will be from the earth, which is one of the reasons for it all being so underground. Solar water with thermosiphon to a reserve tank will be under an insulated window allowing it to not need antifreeze.

I would like the roof joists to all be metal, with sheet steel on that, with the membrane and then the green roof built up on top of that. I don't want any wood anywhere, only metal, concrete, and perhaps some plastics or composite materials, no mold, no mildew, no rot. Interior walls will be some concrete, and walls with plumbing will be metal, with panels that open to provide full access to all plumbing.

The land is off by itself so it will be completely off grid, no utility connections of any kind, and there is about 9 miles of dirt road leading to the property, so that may affect costs somewhat. Also I was hoping to utilize composting toilet vs. septic, not sure on the building codes as far as some of this stuff go, I am off in the middle of nowhere, so I'm not sure if there is building codes, or how all that works. I would like to do as much of the work myself as possible; I've framed houses and done quite a bit of other construction.

Can you email me a sq ft guestimate, it doesn't have to be very accurate at this point, we just want to know kind of what we are looking at so we can decide on the size of the house etc... If there is other info you need before guestimate then let me know.