Bad design. Notice there's no water tower at the top of the structure. This means that they're going to need some mighty pumps to pipe a city's worth of water up to the top of the mountain. Flushing, however, won't be a problem at all.
Nutjobs like this obviously can't hold down a job; how do they pay their bills? How can they afford the robotics gear (hydraulics, batteries, etc.)? How do they afford a furnace to smelt iron?
Oddly, those post-1985ers who have keypads grafted to their hands are the ones who don't know how to spell. "The smarter the phone, the dumber the user" - William Shakespeare
"The smarter the phone, the dumber the user" - William Shakespeare
http://www.nmns.edu.tw/nmns_eng/04exhibit/permanent/grounds.htm