Originally Posted by CPseudonym
It's refreshing to have a larger boater confirm what I've suspected to be true for some time. Boating costs scale remarkably well, percentage wise. Our fuel cost is a similar in percentage of total (somewhat less because of less hours ran) to yours.
We had a 30' runabout on the lake when we lived in NC. Now that was different as we kept it at our dock. No overnights so no docking costs. But then couldn't make a hundred mile run either. Our fuel was probably high percentage wise since we did use it a lot. Still you had the maintenance plus you had to allow for future engine rebuilds although we didn't keep it to that point. And if you decided to add depreciation in, it lost far more percentage wise than any trawler or coastal boat I know.
I just did some comparisons of boat sizes and estimated expenses using the Luxyachts site. Now these were estimates. I even went up to 200'. Was interesting to see the consistency in ratios. There isn't really a single area of costs that isn't size variable. I'd say one thing though that could skew the smaller boats and that's when you have an owner who can do most of the maintenance, from engines to hull painting, themselves.