One mistake is enough of a blow to your crowd meter that when you get back up, the crowd will cheer again as you topped the meter. It's almost like they cheered for the mistake, not for the recovery.
And, applying this to your idea of a tour, I'm repeating what I said in post 3670.
I would make it really tough to break out of your hometown. Too many fail-outs in this stage and your band gets the Bad Ending: run out of your hometown. Mistake penalty on the crowd meter would be RB3 level, and you would start in the middle of the crowd meter instead of in the green. Attempt to play a bigger venue (maybe opening for a touring band) in this early stage and you will start in the red. When you get the van, you will start in the green. Once you get the Roadies in the tour, the mistake penalty on the crowd meter will lessen, to RB2 levels.
There is no penalty for playing lower difficulties until you get big, so if you fail out early on, it will encourage you to step down, and step back up when you progress in the tour. And instead of a hard fan cap, you will get a soft fan cap - a multiplier less than one for your fan and cred gain.