I’m building a homelab Kubernetes cluster with 3 nodes to start (each node has 256GB SSD). I’m looking at an external NAS to add into the mix, but not looking to run applications on the NAS. What is the best & cheapest option for a 2 or 4 bay NAS to use for my K8s applications, Plex, photo backup, files, etc?

This 4-bay Terramaster is definitely in my price range -

https://www.amazon.com/TerraMaster-Transcoding-Personal-Storage-Diskless/dp/B07ZV7K7GX?th=1

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but also open to ideas on just buying an old machine that is low power consumption that I can shove some drives into.