If you're looking to work off of two computers, but don't want to have two sets of keyboards, mouses, and monitors, then you may want to look into picking up a KVM switch.
A KVM switch is a keyboard, video, and mouse switcher that allows you to share a single keyboard, mouse, and monitor between multiple computers. You can find them between $20 - $100, depending on the kind you get. Just pay attention to which kind of KVM you pick up, as there are different types of KVMs out there that have different inputs for video and for different products. There are some that have only VGA or HDMI video inputs, or some that can be controlled over an IP address. Make sure you do the research on what your needs are with a device like the KVM.