Zero, which is why we're not using k8s on-prem. Our team is already handling the on-prem hardware/software environment, and this will consolidate our apps on a single platform methodology, allowing us to keep the same team size. Using mrsk allows us reduce the complexity of our servers, moving that into the Dockerfile.
If we had gone down the k8s on-prem rabbit-hole, I suspect we would have required more folks to manage those components and complexity.