chimbly nailed it.

the 110 is the registration fee. Otherwise RAGBRAI is as expesive as you want it to be. I spent about 10-15 dollars a day.

Going as a team with your own support also makes things cheaper. We would hit up the discount warehouses beforehand for supplies & find the local bigbox stores to resupply during the week.

Last year I went with 5 others where 4 of the them were either vegetarian/vegan. There were two places we bought lunch at everyday (pastafarian & garden of eden) and then we'd cook out at night.

I was happy to have my brake considering on one day I hit 45 mph for 10 minutes.
I freewheeled by unclipping and resting my feet on my track nuts, but was glad to be able to
control my speed since there was a pretty big curve.

I wish we had an RV or a van with AC