There is only one sure way to make a small fortune in the aviation industry and that's to start with a large fortune
Try to call up Sir Richard Branson, I am sure he would be interested in helping out, Virgin already has presence in Africa with Virgin Nigeria
start with a second hand cessna aircraft with a bank loan or borrow money or ask a rich man to invest in your second hand aircraft. ferry people from one state to another and make enough money in 4 years time to payoff the debts and buy a new plane of your own. hire another retiring pilot like yourself for a lower salary and double your turnover.
i know it is easier said than done, but i am telling you a real case which happened in india.
it is called Deccan Airlines, the ceo of the low cost airline made a humble beginning just like you. but now he is succesful, so best of luck!