I don't see all of these underground ideas as being very realistic. If you want a house underground, your probably going to need thick walls because of insects, etc. Also, how are you going to get enough money to build it underground? Underground farms have spent thousands of dollars to do that for seasonal purposes, and that's not including how well light the home. There's too many obstacles for this idea.
count me in! I lived on a farm my whole life so i know about animals (if you want them) and growing a garden and a bit about wild foods (mushrooms and berries mostly)