Good luck with the job hunting,
a couple of ideas no one else has mentioned, there used to be jobs advertised in the UK shipping newspapers for ship's engineers to operate & maintain breweries and sugar refineries.
A sugar refinery basically has big rollers to crush the cane, water pumps to wash the sugar out of the cane, multi stage flash evaporators to concentrate the sugar solution, centrifuges to seperate out the sugar crystals, a boiler to provide heat and maybe an electrical generation plant. I am sure there is nothing there that a marine engineer can't handle.
I was tempted once to relocate to some tropical paradise and do the job, but I didn't get it.
It is always better to ask a stupid question than to do a stupid thing.