[codingdave]

I would not pay anything for a tool to fix this because you can handle it yourself with logging, budgets, and various alerts. The people who are willing to pay for this would likely only pay for it for a few months, until they learn AWS enough to protect themselves from it on their own.

So while the road you are looking down has some validity, it is also a high-churn product idea that only holds value for people who are brand new to AWS. I'd be hesitant to dedicate much time to such a narrow market.