Have you heard of this PC extender? This a gadget that extends your PC. if you have a PC with high specs, you can buy another monitor and connects it to your PC. You now have two monitors, two keyboards and one CPU. You can add up to 5 monitors but it also depends on your PCI slots. One PCI slot can accommodate two monitors because the video card has a dual-head port.
I did that to my PC so now I have two workstations with just one CPU..
I'll try to post a pic so you see it.