He is consistent, I will give him that. Hard to say that is the path I would want my life to follow. Sounds like a remarkably boring existence.
Regarding the container home: I'm not sure it's totally boring. These things are often about the size of a typical mobile or modular home. It's more like they've repurposed the space. It could be well-done on the inside (no pictures, can't say in his case). And you could (with proper permits) place them in a lot of interesting locales.
Eating is a boring activity. I would even take it a step further than soylent and like to be injected with all the required nutrients once, daily.
If you take into account how much time goes into buying, preparing, eating and cleaning up food, the picture becomes much rosier for something like soylent. If you cut out all those activities, you would save literally years of your life for activities that are actually fun.