I think that 3d printing houses is going to be huge but it has a long way to go. They can print the main structure, but not do things like windows, plumbing, electric, trusses, roofs, etc. So a massive part of the construction is still manual.

When the entire building or almost the entire thing is truly automatic, that is going to be a game changer. Not saying it doesn't help now to be able to 3d print a lot of it. But it is in no way a fully automated construction at this point. So the economics are going to get dramatically better as the harder parts get automated.