I just started planning the possibility of returning to Africa, and there are many factors to consider. Do I want to work? Do I want to start a business? How much money do I need to live a comfortable lifestyle? What does comfortable mean to me?
Those are great questions. Once you know what comfortable means to you, you will find that Africa has endless options for retirement. I can think of a nice villa along the Indian coast or a nice ranch overlooking the great rift valley (Kenya). Having an inflow of income is always ideal and consider a good health care option. Good luck!