I'm going to Kenya on Monday night for 7 days, similar to you, I'll do a trip report when I get back, in the meantime, you may get some hints from my thread about it
Mombasa here I come £300 per week
but I've got a flight for £210, and the rest I'll sort out over there, that way I'll only be staying in a hotel that
I like
my only word of advice so far is, if you are thinking of Kenya, you should start to think about getting injections and anti malaria things sorted now, in fact, it's probably a good idea to do it, even if you are going to Thailand