That will be quite a show. I saw Vai years ago and he was good. I saw he just toured with Adrian Belew doing King Crimson stuff.
I was reading about the costs of putting on a tour. It can be tough to make money even when the tickets are expensive. It's an expensive night out when you factor in getting there plus other extras. We looked at Paul McCartney tickets and they were mostly crazy money.
True, the cost for a tour are of course huge. But (I personally think) there is a difference between a Dua lipa of Taylor Swift, with a lot of dancers and show-elements, and a band with only the musicians :) But nevertheless, the entitled to earn a decent pound :)