I was idly watching YouTube videos one night and came across a review of a Pilot Boat/ coastal cruiser thing that only cost around £25k and had live aboard capability. Cheaper than a car. Just the thing for parking up at Gloucester and going for jaunts around the coast, I thought. Maybe a summer cruise up to the Western Isles.
Then I saw the range - 500 miles or so. And the size of the fuel tank - 700 litres at £1.80 or thereabouts per litre. Oops.