Can someone advise me on how one can set up a taxi business in Ghana?

-what are the step by step way of setting such business up as a Nigerian though i plan to set it up with my wife's name because she is Ghanaian but born and brought up in Nigeria.

- Considering the unpredictable traffic situation in some parts of Ghana, is it lucrative?

- How much on the average can one make weekly, working from morning till evening daily excluding weekends?
- Any useful info will be appreciated...