A talented creative research team on-demand for a reasonable price

You’re wedged in quite a spot with this. You’re like a think-tank, but not. Companies can easily partner with some university to get their students to do this sort of thing for close to free, but many don’t. So you’re basically consultants, but presumably without domain expertise working on the easiest part of solving a problem: brainstorming.

But no one is a prophet in their own city...so getting ideas from the outside looks nicer...

I could see quite a big market of bozos for this if you market it right.