Sounds highly intensive from a cost, time, and physical perspective. I can see why there are very few people doing it. Need a high seas craft and costly equipment just to begin the pursuit. 50 miles out is farther than I would venture out in the ocean. Most I have been is twenty miles off NJ coast.
A 14 weight rod, I don't know if I could handle one of those for more than a couple of casts to a mako shark or whatever. Probably need to increase my weight lifting program to throw that weight.
I wonder if Ernest Hemingway or Zane Grey would have tried fly fishing in blue water if they had the fly fishing tackle we have today ?
Look forward to reports when they come.