Someone who could test different marketing channels and tell me which ones worked and which ones didn't. Would be more of a productized service. Once you found a good channel I would pay you a ongoing monthly fee to keep it maintained and re-test other channels.

Heard about this service [0]. Check them out as it could be something close to your needs. No affiliation and experience with them but someone mentioned them to me once

[0] http://gridplay.com/