I wonder when they "flush" where does it go, or even run water down the sinks or the shower,.....don't see any piping under the tin box to indicate a leach field of any kind....I always figure if chit hits the fan to the point that it's the last safe place on earth, then do I really want to live in that thing only to have to come out to ..................what??? Will you even be able to survive when you come out?