I agree with what SD states, as far as
fuel, if you’re going long distance carry extra
fuel on deck in plastic jerry cans or make room for a collapsible
fuel tank.
When empty it can be rolled up and stored. Enough
fuel for about 100 hours of motoring will give you plenty of sea miles it is a sail boat after all.
One big thing an ocean capable boat must have suitable sea berths with good lee cloths.