The physical assembly would likely be a week if you're following instructions and avoiding other people's mistakes. The person who made it probably made a lot

The physical assembly would likely be a week if you're following instructions and avoiding other people's mistakes. The person who made it probably made a lot of mistakes that you're not seeing, and is used to working at this level of quality. You could imagine this whole thing started on a breadboard and IDE at some point, but the final assembly is "print the things that I drew on the computer, glue and screw together".