Nairobi is not an expensive city to holiday in if you restrict your holiday to the city itself. Food, travel and accommodation are comparatively cheaper than most other tourist destinations. Safaris however don’t come cheap, and that will take up most of your holiday budget. For a western traveler the conversion rate is a pittance with 12KHs equaling $0.12! Museums charge a negligible entrance fee. It is basically the national parks and animal shelters that charge high entrance fees, with the money going towards the upkeep of the animals, so you won’t think twice before paying the fee at all.