Starting a new business sure is expensive and at a business like running a taxi service, you sure need a lot of capital from purchasing vehicles and hiring professional drivers to running marketing rounds. But as one of those businesses that are always on demand, a taxi service business would get you deeper pockets in no time. But not to forget, there is quite a lot of competition and the recent uberification; though being a business on demand, we would highly recommend that you have an app for your taxi service business.