Maybe I should not have said that the way I did leaving the question too
wide open but it is an academic debate to decide what is required of a
home after availablity and safety are exist.
What you should have said is that you are focused on emergency shelter. I
thought you were asking your questions from a homesteading point of view. I
have no knowledge of what works best in case of disaster. My focus is on
good homes for people living homesteading lives.