AWS has services which are globally valid such as IAM, or S3. Those will be also fetched when starting komiser. These services will be fetch multiple times as the number of regions. Because fetching IAM role takes the longest. These should be fetched once.

Somehow komiser get access to the terraform (copy and paste into an input field, read from repository, etc.) Komiser decompose the terraform the cloud resources. Estimate the cost based on this decomposed thing, by reusing the cost estimate functions from the providers.