I proved that you dont need a big budget or a big bike to do a tour. Picked up a KLE500 for R20k, spent about R6k on new tyres, chain, sprockets, break pads, luggage rack etc and did 14 relatively trouble free days in Namibia averaging 300/350km a day. Besides a battery issue and clutch switch everything went ok.
Im sure a R200k+ bike would be nice to tour on but its not always necessary, ride what you have got.