You need to buy a KVM or KM switch also called a Keyboard/Video/Mouse switch which will allow you to swap between two or more PC using only 1 monitor.
Good companies doing this are:
Belkin...
You can buy a switch box that have that allows you to connect two computers to one monitor and switch back and forth as you wish. You would three cables. I
It is possible to use two monitors and hopefully this will help you. 1. First you must consider the power usage of using two monitors. If you are not concerned about this, then you can move on. 2. Do...