It is definitely hard to have the foresight necessary, and this whole industry could benefit from a book of devops case studies. That being said, turn off the

It is definitely hard to have the foresight necessary, and this whole industry could benefit from a book of devops case studies. That being said, turn off the EC2 instances and there is rarely an ongoing trickle of costs, as the other services mostly are billed on how much they are invoked, which is good for hobby projects.