Sheer Insanity--you are exactly right, I started with absolutely nothing and have worked for everything I have. I had a good idea, and took a chance and went for it. Like I have said before, "i wasn't born with a silver spoon in my mouth, my dad put a wrench in my hand and taught me how to use it".
My friend, I didn't mean to piss you off at all, I was really trying to give you some mature, age old advise. I was probably driving boats before you were even born. Financing/borrowing over ones head is what is wrong with this world as we speak. People that bought $800,000 homes on a $40,000/year salary is the reason America is in the shape that we are in now. As you asked, "mistakes made by others". My serious point is.... I hope you don't plan to buy a $80,000 boat and finance it for 15 years like I know people that actually have. Start thinking ahead and save, save, save. If you can really afford to buy that $80,000 boat, you shouldn't have a problem saving enough to "just write a check" in 3 to 5 years, IF you start now by thinking ahead. The big plus here, is all the interest you save and can apply that interest saved to future purchases. And, by doing this, you don't have to worry so much about those "credit scores".
Just trying to help a little with what I've learned, over time.
Good luck with your boat hunting.