For successful mining you need three things:
1. Cheap electricity - the most important factor. I am not familiar with how expensive power is in Africa.
2. Cooling - you will need some serious AC to keep your hardware from overheating. In hot environment of Africa this will be additional costs.
3. Hardware - but I guess at this point it is not important where you are, as ASICS can be delivered anywhere.
Do I understand good that you don't have electricity? How do you plan to mine bitcoin then?
I think if you can fulfill this 3 steps successfully you can mine bitcoins everywhere. Cheap electricity, mining equipment and something to cool all that is necessary things, without one of this 3 things you are doomed.
Africa is really big continent, probably with some good investment there is a way for them to set up mining farm one day.