TL;DR: For a small property-management SaaS, start with a hosted API that accepts application-emitted metrics and structured logs, then build the few custom charts the operations team actually uses. This is the least complex route when nobody wants to own Prometheus storage, scrape configuration, Grafana provisioning, or Kubernetes. Attribute every event to a property portfolio and pipeline run from day one; otherwise the dashboard can show that spend increased, but cannot tell you which workloa...