Hi David
There are no mosquito jabs that I know of. People usually have to take medication, for e.g. malarone or similar.
I have not been on this trip, but it is not easy to say how much money you should take as it all depends on the individual. If I were you, I would budget for non included meals, usually lunch, drinks and any souvenirs you want to bring back. I personally take more than what I think I will need and this way you never run short. Have a good trip.
Jaya