https://www.barrett-jackson.com/Bidder/Home
There are several ways to do the financial part. He should read through the choices and decide what is right for him.
Bidder perks include one guest pass, on-site parking, access to the bidder restrooms, event catalogs and seating in the ring. A Tier 1 paddle includes Gala tickets and drink cards. The Gala is held the evening prior to the auction start. Drink cards are nice but I doubt most people drink enough to make it worthwhile. Friday and Saturday afternoon, the bidder bar is mobbed.
Tier 2 paddle is about $150 cheaper, no Gala tix or drink cards. There is an additional discount for getting the app in by early December and they send everything to you prior to the auction.
Don't even think about not doing it. It's a great event.