I think I'm going to keep shopping with my eye on a lightly used newer Chaparral H20 18. I think that gives me the best of both worlds.
Sounds like you have a plan..
I'm pretty much a newbie here, but to share a little of my experience...
My first boat was a learning experience on purpose. Figured out a few things, then went shopping for next step.
I found a used 1985 17' Jay Bee bow rider. Cosmetically it's an eyesore, but it's solid, stringers and transom are sound.
I got pretty lucky there actually, but DANG! the thing MOVES..
Cosmetics I can fix.
Like jimmbo posted:
My favorite little bowrider was a 78-79 Crestliner 550, with a prop rated 90 they could hit about 40 - 42 mph
Mine is NOT the same boat, but it has what seems like the same bow rise at the hole shot.. LOL.
Once it hits plane, it flattens out and screams! Still haven't gone total FULL throttle yet, but last time at about 3/4 throttle, maybe a touch more I got 42mph indicated on the pitot style speedometer.
I will be verifying this with a GPS next time out...
Previous boat only got to about 30mph, so this is a rocket to me.. Still getting used to it.. haha!
The hull is rated for up to a 115hp (which is what's on it), but 75% of the max rating is 86hp.
Would guess a 90hp on the same hull as mine would get 35 anyway... Plenty to pull a tube or skier.
Point is, you have options to find what you want for skiing/tubing.
Brand isn't necessarily a big issue.
Condition, layout for seating, and appointments you're looking for are the real key.
I don't think it's been mentioned, but you don't need to look for a boat that maxes out at 90hp..
You could look for a hull with a max HP rating of say 115-120hp that happens to have a 90 hp on it.
The 90 hp would be roughly 75% of the boats max hp rating.
Meets your lake restrictions, and has "Room to Grow"...
What you don't want, is to get a boat with a max HP rating of say 200hp, and then put a 90hp on it.
You will not be happy with the result.
Again, it seems like you have a plan in mind, and it sounds like a good one from this newbies view.
Odds are I've only mentioned things you already knew. If so, I apologize.
Just adding a little in the off chance it may help in the long run.
My best to you!