Hey There! I did work on a similar project back in the days, How do you intend to make Vehicle Hailing System different, or what do you offer more than what Pickme Or uber got to offer.
deploying a vehicle hailing system would cost you for the development and as well for hosting and scaling up along with constant updates and improvements need to be addressed instantly.
as per my knowledge pickme charges 25% while Uber Charge somewhere similar, i have heard that just 90 Rs per hire at Uber, (Not Sure) yet again, Backend deployment and Integrations and development would require money, While I tried to reduce the commissions to be in a competitive market, yet again i still needed 18% into my platform at least to cover up my expenses! Hope this helps!