Regarding increased cost, are those due to fuel prices, maintenance or generally expensive pilatus operating costs?.
I do not think you will find any aircraft cheaper with same qualites, speed, range, shortfield perfomance etc.
Only suggestion I could come up with is ; King Air 90, probably more expensive, Piaggio P-180, fast, sleek, no short field.
Why not go for those new VLJ jet's; Eclipse jet.