This was my first challenge, as well! I figured it was time to stop reading about them and actually start with this one, before it ends...
Anyway, this one didn't go terribly well, but I had fun. And I know Aston Martin prefers collecting cars to upgrading objects, so he wasn't very happy, haha.
Objects Upgraded: 24 (x1000 = 24,000)
Unique Upgrades: 12 (x3000 = 36,000)
24,000 + 36,000 = 60,000