Tim Tesla finished in the nick of time! He upgraded 120 objects, 77% unique, for a final score of 92. (He's a bit red-faced even to admit that, given the score list!)
I just got the game for Christmas and have only one expansion, Pets, which I picked up yesterday. I'm eager to find out whether a significantly higher score is possible with what's available to me.
In any case, it was fun. I'm looking forward to the next challenge, although it seems a bit more intimidating as there are (ostensibly, anyway) a lot more variables involved.