Re: The Honda Civic of ski boats?
The "honda civic of boats" does not exist. Even if you find a nice used boat that was meticulously maintained, the only way to keep it reliable is to throw money at it to keep up with maintenance and life limited parts. If you can't do your own winterizations/ summerizations then expect to spend at least $500 a year for those for an I/O. I'd also budget in another $500 a year minimum for unexpected items, fuel filters, anodes, etc. Then add your insurance, ramp fees, and fuel costs. Boats are NOT cheap no matter how reliable it is. And when something does break... it will break the bank!
Also 8 people in a 17 or 18 foot boat is unrealistic unless you like being very cramped. Four is comfortable. Six is tight, but don't expect to bring much else (like a large cooler, tube, bags, etc) on the boat with six people.
I also highly suggest looking for a 20+ foot, fresh water, outboard boat. Fresh water boats can also fetch a premium in the price, but they're worth it.
Sorry to come off sounding negative, but it's better to know what you're getting into before you go out and spend your hard earned money. Boats might be a money pit, but the enjoyment they provide is well worth it in my opinion.