(Orchestra dev here too!) That's a great question. We're hoping that emerging online expert communities like Upwork or Dribbble will make it easier and easier to find experts suited to the work, but it's definitely not a solved problem (or tech recruiting would be so much easier!).

Re: MTurk, there's nothing stopping you from stitching microtasks together with Orchestra, but I think that undersells Orchestra's strengths (e.g., collaboration among workers) a bit.