South Africa in the southern summer (November through March) is the move: long daylight hours, warm weather along the coast and in Kruger, and peak safari visibility right after the rains. You can base yourself in Cape Town for Table Mountain and the Winelands, then fly up to a private game reserve near Kruger for three or four nights of drives. The country is set up well for independent travelers once you pre-book the two or three anchors (the Cape Town flight, the safari camp, and one internal flight).
For a budget-conscious traveler, $950 is a realistic 7-to-10 day target if you fly into Johannesburg from the US East Coast on a deal, stay in mid-range guesthouses, and book a budget safari package. The biggest variable is the international airfare, so locking that early is where most of the savings come from.
The 0% intro window is a deadline, not a discount: it is the period during which no interest is charged on purchases, and the moment it ends, any leftover balance starts accruing interest at the card's standard APR. If $950 is still on the card after 18 months, you will owe that balance plus interest from month 19 onward, so the plan only stays free if the balance is fully paid before the window closes.