Comment Re:Hackerspace vrs Lowes Home Depot (Score 1) 134
This would be a better fit at a high end copy center like Kinkos. The people working there have some technical ability, they are used to dealing with consumables, and they are already in the reproduction business. Fee schedule would be some setup cost say, $20, and a per minute print cost (say $0.20). That's fairly expensive per part, but cheaper than buying your own, and much less hassle.
I'd guess a typical store would get a few customers a week printing for a few hours each. So somewhere around $5000 per year in business. Consumables are a question (color and type variety), but would probably be less than $500 per year (electricity, plastic and extruder nozzles). If labor there was $30/hour (way high) that should be less than a half hour of setup and cleanup time (so $1500/year). Break-even point is somewhere around 9 months. Then you are making money as long as the machine lasts. Move nearer a university or R&D business area and your usage rate probably rises fast.
Of course, if you are really going to offer this service these kinds of extrusion based printers aren't the best choice. They are just the cheapest. Higher end systems can print faster, higher tolerance parts with none of the part shape restrictions. Plus they are easier to operate and keep running.
I'm betting someone has run these kinds of numbers and it's a little to small-potatoes to risk it yet.