fuel and marina are the biggest in the uk, i should compare when i am in NZ but mooring is an 7th of the price. think of all the bits and bobs you get during the year £50 here £50 there it all adds up, i bet i am spot on
and the one everyone forgets to add is the depreciation on your investment, if you are good at buying and selling you should be abel to have what i call free boating.
rib say £20,000 10% is £2,000 which does not even cover the mooring fees