Kenya is a hyper religious society with 90% of the population professing a belief in organized religion.
So here is the thing. Get a poor mzungu preferably from Eastern Europe/South America (Brazil) and open a church in Nairobi. We all know Kenyans associate anything white as being “superior” and therefore if you make the mzungu a “head pastor” or something like that, your church would overflow.
As for the mzungu, just pay him $1k USD for a start and rent for him a one bedroom in South B for 30k and then scale as you grow.
Every Sunday collect millions and repeat the process daily. Alternatively, you can also offer washing services for dirty money from politicians and other civil servants. 70/30.
After 5 years you would have had enough to retire. The good thing is that all of it is tax free.
I know of a certain British guy who came to Kenya in the 2000s on the pretext of helping the needy and spreading “the word”. He settled here and today, he runs a successful tours and travel company to the Mara.