Kudos and respect for the big leap you took with your car. Under similar circumstances I could totally see myself doing the same thing. And you're right about owning it for 15+ years and it not being a bad move. Hell, I've owned 5 different vehicles within the last 2 years alone lol.. If I did the math I'm sure it would add up very quickly.
Do you plan to ever do anything "big" with it again? Or just run it until it dies?