Yeah, that's roughly how it works in the US. Pre-WW1, though, there was much more of "buy land and materials, build a house yourself" going on. Like, sometimes

Yeah, that's roughly how it works in the US. Pre-WW1, though, there was much more of "buy land and materials, build a house yourself" going on. Like, sometimes you'd basically clear the trees from a plot and use the lumber from that to build the house. That's what I meant by labor specialization - on the home-buying side, much fewer people can build a home or participate meaningfully in construction and remodeling.