I'm inspired, and I'd love to hear more. I'm curious about the prices: I spent a while just now looking up real estate and saw land ranging from 3,000eur (in accessible, no road) to 80,000eur (inaccessible, no road, but near a village) for about the same area, a hectare or so, in the east near the Alps. I don't know enough about France to know if I was looking in a particularly representative area: for interest, my goal would be to live in a stone house (maybe one I built myself) in deeply mid-European forest (oaks, etc) near hilled mixed forest/farmland or near forested mountains.
I'm looking at Estonia for the same reason (plus I live there already.) Few hills and no mountains, and a long winter, but it is a very forested country, and very high-tech.