Hi, danieldekay. This definitely sounds like a worthwhile customization.
I regret to say that there isn’t really a perfect solution using the built-in interface. I could see working around it by either putting that info into an Additional Field drop-down in the Event listing or including the info in the Venue description. Neither of those solutions really give you what you want though.
Beyond that, I’m afraid you’re looking at finding someone to help you through developing a custom solution for your site. That’s, unfortunately, beyond the scope of what we can help you with in this forum. If you like, we’re happy to share a list of freelancers whom we can vouch for, who would be able to evaluate what you’d be looking at to implement something like this.
I’m sorry I couldn’t be of more assistance!