Boats can be a lot of fun, and also can be a HUGE drain of cash.
B.O.A.T. = Bust Out Another Thousand.
The definition of a boat is a hole in the water that you pour money into, and the bigger the boat the bigger the hole, and the more money you have to throw into that hole.
There are hidden cost that all boat owners have to put up with, and there are hidden cost that can be avoided.
Some of the hidden cost that all boat owners have to put up with are lines, fenders, life jackets of the proper size and rating for the size of the users, up to date fire-extinguisher and first aid kit, routine engine and drive train maintenance, trailer maintenance, tow vehicle, trailer license, trailer inspection if it has brakes, state boat yearly registration, schooling to obtain proper certification for the people who will be operating the boat, dock rent if applicable, winterizing if required.
There are so many things that can cost big bucks with a boat that it is hard to know where to start.
Some of the hidden cost that can be avoided, repair or replacement of prop because of hitting cement or rock while launching, or retrieving to trailer, damage to out-drive and or out-drive coupling from hitting prop, blown engine because of not changing oil, damage to out-drive by removing boat from water with out-drive down, flooding by launching with drain plug out, blowing trailer tire by hitting curb at ramp, stolen prop because it was left on the boat, stolen boat and trailer because it was left in storage without a lock on trailer hitch, and tires were not disabled by chain or removal,
With inboard/outboard boats, many use a standard car engine. I have seen some of the 4 and 6 cylinder car engines that were bored out to get maximum horse power, and sold that way in new boats. Then the owner uses them to ski and usually demands the maximum from them such as towing two people at a time, and they blow up, such as a piston rod through the side or bottom of the engine. The eight cylinders that are not bored out to get extra horse-power seam to last and not blow up. If I were getting a boat I would be looking for an 8 cylinder that has an engine putting out the same amount of horse-power it provides in a car or truck.