What daily costs can I expect to pay for budget accom (camping), food and transport in Botswana for 2 people?

safari travel
KAM asked:

We’ll be spending approximately 2 or 2 weeks in Botswana in late September and I am trying to work out roughly what I should budget for accomodation, transport and food for 2 people travelling together, so I can work out how much I can afford on safari activities. We’re prepared to camp or stay in the cheapest hotels, and eat basic food. This is part of an overland trip from Malawi to South Africa. Many thanks for any assistance. I’d really love to hear from anyone who’s done this!