I could do it as my life would be better than it is now. Life as a pensioner sucks, and I probably spend more on surviving, as I have to have a car, which is a large expense. On board a ship no need of transport.
As my life is not much more than on the internet and movies, it wouldn't even be different, and my diet would be better. There will be a gym on the ship to stay fit, and I presume doctors and dentists.