Obviously, the reason why "maker spaces" lack proper SMT pick n' place, solder mask applicator and other machinery is that it is all quite expensive if it is up to recent specs and maintained. It's also a low margin specialty, so it would be likely that subscribing to a "SMT Makerspace" would be more expensive than just doing business with a proper assembly house.

Even professional electrical engineering shops rarely build their own stuff anymore - specialized assembly houses do the work.

This is the flip side of efficiency achieved through specialization - most pro hardware "STEM" jobs consist of manipulating computer files in various formats and passing the buck to some stranger to do the actual construction. Unfortunately, this leaves a pretty big monetary gap between "circuit stuff as a hobby" and "I want to make a serious product using the best technologies available"