I financed about 80%. I found a good deal a lot earlier than I'd expected, and I just couldn't pass it up. I was 'ready' mentally, but slightly less so financially. I couldn't afford to pay cash. I had some cash on hand, some equity in my house, and was able to secure financing at a rate I was comfortable with, so I went for it.
My house will be going on the market within the next few weeks, and I'll put the proceeds toward the boat loan, and pay off the vast majority of it. I can have the remainder paid off at a comfortable pace within 2-3 years. Absolute worst case scenario, the market takes a dump tomorrow and nobody buys my house. I can still afford both. I'd rather not, but I can handle it.
I'm not a genius when it comes to managing money. Every time I try to learn more about investing, my eyes just glaze over, and I slowly start to lose consciousness. I'm sure there are many people who would say I'm being dumb. I'm okay with that. I'm going after the dream, and at 35, if I screw it all up, I should still be able to recover. In the end, I think I'll be glad I didn't wait until I could pay cash. I may not live that long!