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Building Structure

Desired Features

Main hall as below
Kitchen half level up with separate glass roof
2 bedrooms with individual bathrooms
Bathrooms above bedrooms with good solar lighting
Tankless electric showers
Spiral staircase to rooftop patio
Solar panels
Roof on patio where solar panels are mounted
Energy storage: batteries + hot water storage tank
Cold water storage tank
Passive humidity control with automated windows

Foundation

Home Foundation Types and How to Choose One, architecturaldigest.com
All About Strong House Foundations, Max at thisoldhouse.com

Flooring

I grew up with wall to wall carpet, and I appreciate how soft it is. But maintenance is too much of a chore. I don't like ceramic because everything breaks when hitting the floor. So maybe some kind of wood flooring laid atop something not too rigid? Maybe carpeting is worth the effort considering the time and cost saved by not having to replace cell phones and laptops because your cat hates not getting attention.

Walls

Stone

I can build with stone and mortar more cheaply than brick as I can source stone locally. Big improvement over adobe which is the most common in the area.

How to Safely Move Heavy Stones Without Equipment, drystonejoe.com
Moving Heavy Stones, youtube.com
How to Move Boulders without Heavy Equipment, youtube.com

Loading Rocks onto a Truck or Trailer, houzz.com