I agree - a safari is a life changing experience.
And 3-4 days is the max you can comfortably do.
First went with my partner (now DH) to Kenya Masai Mara and saw the migration in 2002 and onto Diani. Dreamt of returning to Africa for another Safari ever since.
Finally able to afford to take our young adult children last August to Southern Tanzania and onto Zanzibar.
Agree - spend as much as you can for exclusivity.
Stay in accommodation on a national park, you drive out at sunrise and get the best quiet time in the park, then the ‘out of towners’ arrive mid morning in overly stuffed mini vans and you can avoid them!
I’m British, but briefly lived in West Africa as a teenager, which I loved. Personally I lost my heart to Tanzania, it was full of friendly, welcoming people with great humour and pride in their beautiful country.
If you go, buy a decent camera! And don’t forget to pack the battery chargers! And check you have an SD card! (All things that happened to us or people we know!)