I have to say I really like all the wood.
But did I hear him right that he just dumps the water from the shower? That's not good. If you put the water in the sewer it gets recycled.
It's basically impossible to waste water from a shower if you are on a public sewer, since the next city downriver uses it. Also, never use a septic system, those are bad for the environment since they waste water.
Very cool house though.