@VacationQueen I have done many safari holidays. I’ve been to most of East Africa and South Africa. So here’s my take.
Cost depends on quality of lodge. Some are luxurious, and you pay a premium. The animals are the same if you go down a notch!
For me, ignore beach resorts. Go for a better safari. I strongly recommend Wildlife Worldwide and Expert Africa. Safaris are their business and they know where to go and when.
South Africa - Sabi Sands (Nottens bush camp is great) and Hluhluwe Imfolozi are fantastic. Try and avoid rewilded farms.
Zambia - amazing. Zambezi lodges or the Luangwa Valley. Some of the best viewing, walking safaris and night drives.
Botswana. Okavango delta and Moremi. Small aircraft flights necessary but some of the best wildlife viewing and variety.
These are my top 3 but Tanzania is also good and Kenya for the wildebeest migration - but very very busy! Stay in the parks - eg Little Governors camp in the Mara is great.
So what animals actually interest you? Lions, leopards, elephants, cheetahs, smaller game, giraffes, wild dogs, rhino hippos, buffalo? You need to think about this because some reserves are strongholds and others are not. If you want something special, ask Wildlife Worldwide! Eg Rhinos are abundant in Kruger. Leopards - Sabi Sands. Wild dogs - Moremi in Botswana. Lions - decreasing numbers but nearly everywhere. So what would you like to see?