I am seriously considering for retirement an off the grid home often called "cob houses". Been picking up a lot of books on the subject and love the idea. Looking at a "hobbit hole" partially underground with sod roof, etc.
*in my best Mr. Burns voice*... Excellent...
I like the idea of building partially underground. Moderating effect of the earth would mean no A/C needed in summer (at least probably from Montana and North), and less heat needed on the cold winter nights.
What I'm planning is a wide bungalow with a walkout basement facing SW. Should be able to capture some of the suns energy to help heat the inside of the house (hence the concrete surfaces to again act as moderators)
If people won't pay more for fancy finishes, they will be more if their monthly bills can be reduced or eliminated. How much would you pay extra identical houses if one was off the grid?