North Atlantic ferry flying is one of the last choices I would advise any relatively low time pilot to contemplate.
The North Atlantic, especially Greenland is some of the most dangerous and unforgiving places on the planet to fly.
There isn't enough money printed to interest me in flying even one trip in a single engine airplane on that route.
But that is only my own feelings about playing russian roulette with an engine.
Now if you are flying a multi engine turbine above FL180 that is another thing...
Chuck E.