The piaggio doesn't have the same short field numbers as a king air. You can shoe horn it into small fields, but you shouldn't. 4,000 feet ought to be the minimum one is considering. Yes, it's a turboprop, but it aproaches and lands at learjet speeds. It's got the same wing area as a cessna 182...but considerably more weight. As light twins go, it has reasonably descent single engine climb performance, but don't bank on that out of a short field, especially one with obstacles.
It's not that much more expensive than a King Air, these days. It's roomier, considerably faster (forget the factory numbers, and plan for 370 true), does go to FL410, is definitely quieter, more comfortable inside, and a pleasure to fly.
Five hundred miles...two hours and fourteen hundred pounds, more or less. That's climb to altitude, the arrival, the whole flight. That's also climbing to FL330 or better, and a ballpark number. Figure the same fuel burn as a King Air 200 and a hundred knots faster.