I want to know when we can start building using robots real space ships. Will not be hard a tall.
Just use printing robots that read blue prints.
The only downside will be our ancient thrust mechanical engines and missing gravity plating.
We could build it today if we really wanted to. We already have 3D printers that can print metal to make metal cars parts for engines and body.
Now we just need metalic see though glass to be 3D printed.