Forum ID: foxwater
Build Title: Grass Block Server
Thread URL: http://www.instructables.com/id/Personal-Minecraft-Server-in-Custom-Block-Case/
Description: I made this awhile back and have been using it to host my minecraft server/decorate my room, hits about 15W at CPU load (iGPU doesn't get used when hosting). Total build cost: ~$350
Full disclosure...even I will be voting for White Metropolis.
Note: the monitor is not hooked up to the server, it's hooked up to my more beastly rig, which is playing the hosted minecraft world.