This depends on how strong your network and convincing skills are. The trick to spending the least time and earning maximum is through becoming excellent at pitching Vamaship.
We have no minimum time commitment which is needed from Ambassadors and the average time which Ambassadors spend on bringing businesses on-board Vamaship is a few hours every week/weekend.
We have seen Ambassadors work only a few hours a month but bring large businesses on-board too. So its upto you on how quickly you can convert.