The recommended path to install and operate Kubecost is via the Helm chart install instructions available at kubecost.com/install. This chart contains all the required components to get started, and can scale to large deployments. It also provides the most flexibility for configuring Kubecost and its dependencies.
Alternatively, you can install via flat manifest, but this install path provides less flexiblity for managing your deployment and has several product limitations.
Lastly, you can deploy the open source, cost model engine directly as a pod. This install path provides a subset of Kubecost functionality and is available here.