Yeah... I'd thought of a twin otter but its only just resurrected from the ashes, with what is in effect a new company. Two engines make it quite a bit more expensive than its nearest rival with overhaul costs etc, and neither can they produce them as fast as their competitor. And this African idea of making them two crew ops also adds to the basic running costs, training costs, and hassles with getting pilots capable of flying them. And the rudder tiller makes it a little non-standard compared with the basic set up of aircraft controls.
So all in all it still just doesn't stack up to the other contender. Bush plane or not.