Considering move from Team to Enterprise. Am I in for cost shock?

Our business currently has 2 team profiles that are nearly maxed out (~290 users) and growing. We have 30 premium accounts who are heavy users, an additional 20 who probably could be bumped up to premium, and the rest are moderate to low usage Logic says get everyone together on an Enterprise account but I just can’t get my head around the API use calculations because of the way Teams report their usage structure. I just fear of locking in for a year and either having to lock down usage to the point our super users can’t really use Claude properly, or we just absorb a massive bill. Also considering we’re largely a Microsoft shop, I’m half tempted to migrate all the basic users over to Copilot and have them use Claude there, but they just introduced usage pricing on Cowork that’s even more confusing than Anthropics. It’s all an annoyingly non-transparent puzzle.