Prices of camps in the delta are very expensive. However, if you traveled during the Green (low) Season you could find some good deals. Try looking at Kwando's Five Rivers specials for Nov. 15-end March.
But if you're in VF it makes perfect sense to visit nearby Botswana. You can also look at Chobe.
As an Israeli citizen you don't need a visa for Botswana, Mozambique is a great location for going to the beach, but isn't yet a good safari location. Namibia offers the best desert scenery in the world, as well as stunning and desolate coast, but it isn't in the same category as Botswana as a safari destination.
Botswana no longer allows big game hunting, but Namibia still does. Namibia also has a serious problem with poaching.