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Building a home lab allows you to experiment with different operating systems, self-host a variety of services, and learn about networking and virtual machines. Key components include CPUs with multiple cores, ECC memory, and potentially budget Xeon systems. Software options like Proxmox, XCP-ng, and Docker provide flexible environments for your projects. Keep an eye on budget and power consumption as it's easy to go overboard with additional peripherals.

How to build your first home lab

For me first homelab “server” could be done from old PC that you’ve lying around or if you have few bucks to spare you can buy something like HP Elitedesk 800 G3 SFF (or any other prebuild pc from dell, lenovo whatever) that already have intel 7/8th gen, pack it with 16/32GB of RAM which is really cheap and for starter to learn proxmox/docker/run minecraft server for friends is quite good. Later you can put some 2.5Gb NICs and so on. Quite good platform to start with.
And mostly important is not power hungry like old platforms on Xeon - here we’re talking about 20-30W with HDDs

Best complete with good table and chair :)

Looks good, but I would buy cheap hardware to setup a homelab if I were learning, could be enterprise mini hp elitedesk 800 g4, you could buy as many as you want to create a Kubernetes lab.
PS: I didn’t read the comment below, but I agree with <a href="https://app.daily.dev/pabllo" data-mention-id="4YkXZuJNT1snNwgoR4ttR" data-mention-username="pabllo">@pabllo</a> . Also if you want to play more, you can buy raspberrys to setup a good lab.