go to sites such as
http://boatinfo.no/lib/library.html# and look up the recommended maintenance for various V6 or V8 installations
fluid changes - engine oil and gear oil - usually 50 hours or annually
pull the drive for gimbal and u-joint inspection and to verify alignment - annually
periodic replacement of raw water impeller/pump and the bellows - these rubber bits do not care if you use the boat or not, their life is determined by the fact that they are rubber and have a finite usable life on this planet.
winterization, summerization
fuel system maintenance (filter, fuel quality, etc) - usually 100 hours or annually
upholstery and soft surface mantenance - usually weekly
hull maintenance - usually twice a season
trailer maintenance - usually annually
"typical maintenance".... will vary slightly from boat to boat and location to location
if you do the work yourself:
expect $300-$500 a year on fluids, incidentals, parts, etc
expect about $150-$300 on cleaners/conditioners/wax/etc
Typical repairs..... face it sometimes things go awry
I estimate about $300-$500 a year replacing items or repairing items like not putting a VHF antenna down for a bridge :facepalm:
having a bimini top cover disappear out the boat somewhere on the water
a bilge pump that fails (usually requires pulling the engine to get to it)
a trailer bearing goes south, or a brake actuator starts failing...
typical insurance - about $30-$80 a month depending on your insurance company and your record with them
typical storage - many open un-covered yard storage is usually $1/ft or more. if you want covered storage, $50-$100 a month or more. if you get a storage unit, about $65-$150 a month or more..... all depending on your location
then there is fuel burn. your motor will burn 0.4# of fuel per HP commanded per hour.
boats get at best 2 miles per gallon at steady state running. rough weather, wind, currents, water sports, etc. all will take more fuel...... expect to spend $50-$150 in fuel per typical outing.
Typically I put between $50 and $75 each outing on my SeaRay and I put between $100 and $150 each outing on my current boat.
I try to get out on average 25-30 times a year to make owning a boat worth while. I should be spending more fuel than maintenance and insurance in order to justify owning the boat.