4 wheels, hard case, not too expensive because they throw the bags around quite violently.
There is a Samsonite Facotry shop in fairlands (at the centre that used to be called world wear) that has samsonite and american tourister bags at a discount (30% to 50% off)
There is a new hardware store in Joburg (greenstone) called leroy merlin that had very affordable kitchens on show. https://leroymerlin.co.za/kitchen/kitchen-furniture/kitchen-kit
They also have installers to come and do it for you. Might be more affordable, but you can always get quotes from a...