Stick with marine industry. Yes you are away from home a long time, but then again you are also a long time at home. I really like flying. And if i loose my flyng job, yes it will hurt....but experience is not valued anymore in aviation land. And that is a point i am really disappointed in. I've send many cv's the last 4 years without 1 single shot. And that you don't have in the marine industry. Even after a few years you are not on sea anymore, you have more options to do somethng else in this industry, with a decent salary ofcourse. My advice: stick with your job and fly for fun, or as freelance.
Good luck.