TFCB Workspace Destroy specific objects

I am just getting started with TFCB and trying to work out how I should be utilizing the workspaces. Doing one workspace per resource item seems like it would get overwhelming with the number of potential workspaces. I then had a thought about maybe for a specific application deployment, something that utilized a DBaaS and a Kubernetes cluster, creating those together in a single workspace. However, if I wanted to destroy just the Kubernetes cluster and leave the DBaaS alone I do not see a way to do that.

Wondering what others have done with their setups.