I was quite surprised that these were now 3.0L 161hp 295 lb-ft engines. The dealer said the awesome duonic transmission means they don't need as much hp.
Did you drive it? They are dog turds empty, cannot imagine one with a 4-5k camper box (supplies, water, personal items, extra fuel, etc) or more on it.. I realise the trend is smaller engines for "better economy" but if the engine is revving its balls off or struggling all the time, better fuel economy is not the result.
In the 3/4 ton and 1 ton diesel truck world, manufacturers have gone the same way with emissions stuff. So now a new one ton diesel truck gets 10-12 MPG but the exhaust is clean. So you burn 50% more fuel to get to your destination?? How is that better?
Not sure what your options are in SA or what the emissions laws are there, but you may wish to consider an older truck with good service history. They do not require DEF/Ad Blue and could potentially be much easier/cheaper to service than a new truck saddled with electro-gadgets. If you talk to the camper builders in Oz, they will generally tell you that the Isuzu is the better built truck IIRC...
Good luck in your search