These are garage/carport sized machines where you download a “pattern”, buy the raw materials required and place QR stickers on them, and then the machine does the rest. Can build everything from furniture to rocket ships.
This works in 3 parts. There’s the pattern provider, similar to 3d printing sites, there’s the raw materials, which might work by submitting your pattern to your local hardware store and having them deliver it, and the machine itself.
If you can sell each machine for $20k there is probably a payoff within 10 years. You move into a house, install one of these things, and then any furniture you want you can have it build.