Just in case you all haven't seen this before (or haven't thought about it). I was thinking that since it seems like lots of prototype boards are being made perhaps a prototype circuit board printer like the following might be useful for prototyping some of the simpler support boards (e.g. some of the laptop PCBs).
https://voltera.io/I'm not exactly sure how much cheaper (if any) that it would be compared to getting prototype boards printed up by another company but, I could imagine that being able to print up your own circuit boards would probably help speed up the design/prototype iteration cycle.