self catering accomodation needed

I am a German man travelling through Botswana in March 05, and I would like to find budget accomodation in game reserves.
Can anyone help me?
Does anyone have the phone no. of this:"Mokolodi (nature reserve) which is about 30 min outside of Gabarone"
There are reportredly self catering chalets available.
Can anyone help me wher to find a 4x4WD car to rent?
Thanks so much for your help!