I’m running a couple dozen docker containers on unraid and I only have one NVME cache disk, it’s 256 GB. I have only have 76 GB filled on my cache disk, the majority being attributed to Plex with things like movie trailers, temporary storage for torrenting, etc.
Just wanted to give you a heads up that 1 TB and a 2 TB NVME drives may be a bit overkill unlesa you’re trying to host a lot of VM’s