the very last line of the article:

"If I were to do this again, I wouldn’t do a custom build like this. I would buy a standard datacenter server and rent space in a colocation center. But then I would miss saying Hi to grumbl once in a while."

Yes, i mean, he could rent a cage and run grumbl it there. It doesn't have to be a standard datacenter server, even though a standard datacenter server would be better and cheaper.