Im a litle confused about the power. Looks like there are batteries for the power but how would you keeep them charged? You would need some sort of power source, like wind or solar if the main power grid went down.
You would also need some sort of water source, large gallon water tank dug in next to the unit. Especially if you have a shower built in the thing
What about the toliet do they hook that up to a spetic?
Seems like there are lots of question if this were a long term bundker.
It is very cool however!