So then I thought it would've been great if I could've found someone with an available printer (through an app or website), within a short distance, and paid them for the service instead of a huge national chain. Does that service exist? If so, what's it called and would you recommend it?
Hard to build a business when there is ubiquitous existing supply combined with most home printers having much higher ink costs and dodgy print quality due to lack of use/maintenance.
There are issues with regards to security when you transfer the files for printing, privacy issues on the content itself and then of course issues with regards to the quality of the printer and the printed material itself. But I actually still believe it would be possible to make a profitable company out of it.
Every company does not need to aim for unicorn status.
Apartment complexes and car repair shops come to mind as places that have printers. The fees to the consumer would probably be astronomical compared to the $0.25/page a print shop might charge.
Driving someone around is small invasion of privacy, I can't imagine individuals wanting to invite others into their homes for a buck or two.