The good thing I have on my side is that I wont be in a hurry to make a trip on any given Day. Its easy to check the winds aloft and pick a suitable day on which to make the trip. Also, the winds for this particular route are predominantly from west to east and are usually more favourable for an eastbound crossing but of course not always. I am aware of the fuel cost not just in Narsarsuaq but the whole of Greenland have extortionate prices but it doesnt warrant the cost of fitting either ferry tanks or Monroy tanks just for the purpose of making the crossing one way. I am assuming the G1000 in the picture may be from an acclaim but as you can see, at altitude, that still returns a healthy 197 ground speed eastbound. Even at 180kts ground speed, its still only a 3.5 hour crossing from Goose.