It sounds like absolute heaven on earth, dewt.
I don’t know if this is the same as your “earthship” idea, but years ago my mom looked very seriously into earth-sheltered homes. We toured some, and I may even have her blueprints around here somewhere. I’ll look. You’re welcome to them if I find them.
Basically most of the house is underground; a front facade is left open and some cleverly engineered light-slits, etc. around. I can’t say they were things of architectuaral beauty from the outside, but they blended so well into the landscape they had their own kind of grace. (You’d need a slight hill or rise, btw.)
The houses themselves were amazingly inexpensive. Basically you excavate a hole back into the hillside, put the concrete structure in, then cover it back up. The earth acts as natural insulation, and heating costs are minimal. Some just used fireplaces and woodstoves; very comfy. Though that’s why the initial engineering is important, for structual strength, venilation, etc. But the actual building costs are peanuts, relatively speaking, and maintenance is minimal. Amazing how much you can save when you don’t have to worry about exposed exteriors, e.g. protecting from the enviroment, doo dads, etc. The ones we saw had a sort of porch/patio in front–and root cellars built in back!
Oddly enough, they weren’t in the least dark or claustrophobic. Obviously they paid extra attention to lighting, but unless you’re used to uncurtained windows you probably wouldn’t notice a difference.
It’s eminently doable–but if I may–reconsider the built on bed & breakfast idea. Extra structure, extra expense, killer maintenance and a high bar for projected business to cover costs. I’d suggest going for some extra living space and maybe another bathroom in your projected home and go for the “offbeat” trade–especially since it’s in an isolated area. I’ve seen too many people around here go broke rehabbing elaborate Victorians, thinking the B&B trade would recoup costs.
The fun of B&Bs is they’re unique. An earthship B&B, with a resident potter, stained-glass maker, home-grown food, etc.? Putting your resources into that angle would save you mega-bucks, be a lot more marketable and helluva lot more fun for you as well.
In all honesty, you’re doing a great thing, dewt. It’s the life you want and only logistics remain. They’ll work out.
Veb