I don't get the appeal of doing the "extreme" thing. Or maybe I should say, the extreme savings so you can retire early to live a mostly austere lifestyle doesn't sound appealing. I do know some folks that somewhat did this, moving to NZ for a few years while one parent taught, and the other worked odd jobs to stay busy and took care of the kids.
They are both working FT again, and back in the States. I guess in the end everyone has their risk tolerance, and lifestyle wants.