Data Centers are just big homelabs
Or the other way around. So You Want to Build Your Own Data Center is a great post to get a high level understanding of the physical aspect of building a data center or small cage in one.
There are some lessons that translate nearly 1:1 to your homelab no matter how big or small. Proper cable management not just to look pretty and some documentation what is where will always help. Especially when you are on a different continent and need to explain someone how to restart a system or which cable to pull. Ask me how I know.
Considering there is "part one" in the URL I hope for more as they continue working on this.