Is it a major cost to your business? Would it be a large risk if things went badly? Also, does your current setup have any problems (perhaps scaling)? If the

Is it a major cost to your business? Would it be a large risk if things went badly? Also, does your current setup have any problems (perhaps scaling)? If the answers are no, yes, no then I'd not change a thing. Otherwise perhaps look at using Turk for labeling and your working crew as reviewers. It may only take a small number of badly labeled images to cost more than you save.