It's more expensive, not less, but I'd get an SLA printer like the Form Labs for its incredible super fine resolution. If you're getting many you would need one of those for sure. I know I want one. Flashforge is supposed to be coming out with an SLA printer soon. Ok, back to the budget minded ones.... so long as the print volume is enough I'd get a Printrbot. I've never had one but they have a big following. I'd stay away from proprietary spools at all costs personally