Howdy,
I do know some school in Nairobi where you can participate for three months and have some really good accommodation, a walking distance to the school.
I also can introduce you to the same host person that gave me accommodation for 6 months, if you are interested. I am sure he can accommodate you for free and also the school can accept you for free, but am not sure about food; I think you will have to sort that out with him.
Email me if you are interested on
sandman6030@yahoo.com and will give you his contacts.
P/S: The same contact organized for me the primary school, he is a good person. His house is a 2 bed roomed apartment so there is an extra room available.
Cheers
Wecie Miles