[Retric]

I think there paying far more than 6cents per gallon.

Still, you forget generators are less than 100% efficient. At 30% that 30kW/hr = 9kW/hr for 6 cent. = 1.5 cents per kW/hr + cost of generator which is far from free.

Anyway, your far better off just selling the gas.

[aet]

I think it is the efficiency that I didn't consider. As far as I know, gas is roughly 5 cents a gallon.

[Retric]

For comparison I suspect you could easily get 1$ a gallon by just selling that gas. Using a mid sized fishing boat you could probably move ~1 to 10k gallons from the ships's fuel tank to a near by country without that seeming odd. Make that trip once a week and your living the good life without doing anything 'odd.' Hell I suspect you could simply meeting other fishing boats at sea fill their tanks for cash or even fish which would be next to impossible to catch.