Brilliant!!!  Maybe an 8 lb doughnut filled with 4 lbs of cream cheese, refined sugar/select corn syrup, malted milk powder and a solid artisan butter core - said core wrapped in cake frosting and bacon bits/grease. Finish it in 7-10 minutes and it's free! I'll bet that could get to 20-30k calories easy. Make it a challenge with a liability waiver. It could be world famous. But he/she may have to wear a fat suit or hire a fat spokes"model", paid in leftover lard for you know.... credibility.