You'll need enough for travel expenses plus daily costs such as meals or activities. Depending on your style of travel this could be between $250 - $3000 per day.
Africa's a big place with varied climates. However, generally May through October offers cooler temperatures and less rain in many popular destinations.
The price of an African getaway varies. It depends on factors like duration, destination, and luxury level. Generally speaking, it can range from $2000 to over $20,000.
Pick your time based on what you want to see: wildlife migrations occur at different times across the continent; if beaches are your thing aim for dry seasons.