In what countries can you get high quality factory-built housing?
https://en.wikipedia.org/wiki/Sears_Modern_Homes
Currently you can't get them in other countries, if by houses you mean buildings shaped like American houses. That's because we made it illegal to build any other type.
https://www.construction-physics.com/p/japans-skyscraper-fac...
(Also recommend reading everything else he wrote. This is an inaccurate summary of it.)
Also, here's a building in Seattle that's a new type of wood called "mass timber" that can be built very quickly and cheaply. It wasn't legal until recently, and I'm not sure if it is in other cities yet.