I actually run a server and I just have a bunch of loose cpus, memory cards, hard drives, etc from other computers and I just sync them all up wirelessly using Bluetooth from my iphone. Works pretty well except you have to pour water on the graphics card pretty frequently to keep it cooled. Its also kind of hard sometimes cause I only have 2 Memory card chargers and I run it with 8 memory cards (128 ounces of storage on each) so i have to make sure I charge them all before I open the server. Server has about 800 slots, pretty good for only 200kb power supply :)
~ @bloodyghost
OMG... that's almost the same setup I use, but mine has 1,000 slots which I tested with my 1,000 alts all at the same time... battery only lasted 7 mins though :( before batteries died.
1: Not PCs, servers.
2: 8 servers for 8 worlds, not 16 lol
~ @FamousZAmos
Not even close, all 8 of meep worlds run on 1 overclocked toaster oven, powered by an 8 year old (157 hamster years) hampster. True story, I seen it running when it was in Onis' closet before it moved to Fuzzlr basement.