Here's one my girlfriend and I have been building for a couple of years now (mostly in the winter, you know the best time for construction in Montana)
We're almost done with it, and this week is the first week we've been living in it! We're about $17k in for materials, but it's pretty ritzy, the whole thing is insulated with sheeps wool.
Including our handmade wool mattress Sydney made because we realized post de facto that we couldn't fit a queen sized bed through our custom 30" high door.
We have a nice little wood stove for heat, and a propane cookstove, and a small electric fridge.
beautiful.