Well, first of all, I would need to purchase a garage!
Then I would fill it with tools. I would spend the money on tools instead of more cars, but then I would be better able to keep my two Hondas in top shape.
I stopped missing my first car, a 1987 Honda Prelude Si, when I bought Chorizo. They have enough similarities, but my Civic has cupholders, and oh, beats the best tank in my Prelude on almost every single tank, with apparently low compression.
Yeah, if I could afford to collect cars, I would rebuild the engine I already have...