Yep, our 40' cat is 12m x 7m so 84m2
A 50, cat is 15m x 8.5m so 128m2 which is around 50% more area, accommodation, fuel
expenses, anti foul, docking fees
, haul outs, sail costs, running and standard rigging
, not to mention the items sand crab mentioned above. Some items will cost the same, like a pump that needs replacing or plotter repair. New boat cost is probably around double so insurance
around double as well.. We deliberately stayed under 12m (11.97m) to avoid those additional costs and associated work (cleaning) and 12m is more than enough boat for us, especially with the beamy 7.25m.