Is this setup feasible for a power efficient 25G router?
What data source do you have that can saturate a 25Gb link?
What is your usecase ... video editing?
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Got this for literally free. Ram sticks and drives are missing. Any tips for sourcing the parts?
From this angle, that looks like a DL380 G5. It's not worth buying parts for. But if you must ... EBAY, of course.
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Would this be good for a Plex server?
Decent plex host, but you'll hear it, and your power bill may sting a little because of it. Also, tanscoding won't be great, consider a GPU if compatible.
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How do you keep track of where each drive is plugged in ?
If all you have is the serial number of the disk that is failing ... you'd better know what slot it's in before you go pulling disks for replacement.
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When does it stop being homelab and become homeserver?
You are asking the wrong question... when does server become lab (multiple servers).
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Out of warranty at work therefore into my basement at home
You'll be stealing all your licenses, right?
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