why do you need a server room?
ni
Because I can.

Pretty much everything I do is hosted in it in some way shape or form. File storage, email, DNS, development stuff, various VMs for stuff, home automation, etc...
If my ISP provided static IPs and allowed servers I'd probably host my websites at home too. They do allow game servers so do have a game server but all my web stuff is on a leased server. I would need to get more batteries and a generator though but that's not a big deal. I eventually want to do solar, I have room for a 3kw system, it would run the server room no issues with big enough batteries. Well winter would be harder due to short days but think it would work ok. Only pulling like 400w.