Road trip to botswana

hi people.i want to travel to Botswana by road and i'll pass through 2 countries namely Tanzania and Zambia.i need advice about the road trip what obstacles i'll face and i'll be doing this on a insanely low budget lol...anybody who had the same experience will be highly appreciated if you share it with me thank you

i dont think it will be hard anymore this other guy shared with me about the road trip and i  think it will be awesome.....but i still didnt understand about the border thing..will passing through the border, will i have to pay anything? like visa or something? or its just a stamp on my passport(KENYAN PASSPORT)????!!!!.....