I would love to do a project like this, but having toddlers around, how did he find the time to actually do this? These seems like hours and hours of learning and working (which I would love), but one of the things I miss most after having kids is having time for hobbies like this.
I don't think this blog is right - a lot of suburban homes are modular and actually built in factories on an assembly line. For example, in Canada Mattamy homes uses an assembly line: https://www.mammoet.com/cases/mattamy/