I think this is a kick ***** idea... Yupp..

Now if I only had a twin to bring...

However, BalsaOvercast, all the categories you have listed
are basically "who has the most money to waste", categories..

While of course those are good categories, how about things as
smallest, slowest, etc ... Categories that us poooorr people can
compete for..
Now if you wanna do one for who has the most polished parts,
I'm game...