I don't have any great pointers unfortunately, though I met someone not too long ago who has a product to help with monitoring AWS costs: https://www.cloudforecast.io/
Disclaimer: I've never used this tool as I don't use AWS but if I did have to use AWS, I would likely try something like this at least early in the game to avoid getting rekd.
I've seen this happen: https://www.reddit.com/r/ProgrammerHumor/comments/w4eo12/usi...
I don't have any great pointers unfortunately, though I met someone not too long ago who has a product to help with monitoring AWS costs: https://www.cloudforecast.io/
Disclaimer: I've never used this tool as I don't use AWS but if I did have to use AWS, I would likely try something like this at least early in the game to avoid getting rekd.