Home 3d print service
I think you can list individual category of 3d printers who is hobbiest like mine can offer 3d printing in nearby areas for very cheap alternate so that new comers can enjoy their own first prints.
I explain in my Hub-description I am "hobbyist": cheaper price, slower turnaround. I maust admint I have not been overwhelmed by orders, so it is not a crowdpuller. I suspect, like the poster of the idea, that some hobbyst would feel more comfortable to work with another one.