Perhaps give Flowpipe [1] a try? It provides "Pipelines for DevOps", including a library of AWS actions [2], that can be run on a schedule (e.g. daily) or a trigger (e.g. instance start) to do things like turn off, update or delete expensive assets. It can also be combined with Steampipe [3] and the queries from the AWS Thrifty mod [4] to do common queries. We'd love your feedback if you give it a spin!