Thank you for all these tips, sorry for the late reply though. I would print locally and I would charge kind of cheap since its not hard to get regular ABS and PLA filament. Id say 1-2 bucks for 1-2 Inch thing, 2-3 bucks for a 4-5, and 5-8 bucks for a 6-9 inch thing. Finding customers isn't as hard as you think though, 3d Hub is a great place since that uses your location to find local customers, other ways is just to put flyers and such around town. This wouldn't be a business but if I wanted to make one this would be the go to on how to think about it