Well cost of the boat...Tires fail every so many years, registration every two years, trailer lights seem to fail every winter, boat motor if older will need looked at every spring, either by yourself or by a professional. Gas and Bait. It's about $75 dollars a trip for me. (lake arthur and pymatuning) The river's a little cheaper $40 (ohio) but you can't eat ohio river fish, at least I don't. The occasional lost lure is another $8-14 charge. I try and find people that are williing to split the expenses, by taking my father will me I foot the bill.