I'm a nerd with a thing for punishing myself so setting up a small fake corporate environment that I can hack or configure would be fun. There's a tool called velociraptor that you can use to hunt over multiple devices which I want to learn.
Also just learning how to configure a domain, group policy, etc. I'd do like an 8 computer network if I had a machine that could run it. Setting up something like network segmentation, then "hacking" in and configuring attacker infrastructure sounds fun if not, again, totally overkill for what I want to do. I'd be phishing myself at the end of the day but it'd be fun to try.
Might be a dumb question but how would these go for storage? Can you plug a lot of drives into them?