Need two computer screens for my work at home. One to work on, one to simply show streaming quotes. Ideas?

Connect two monitors.

2 video cards will work and 1 video card that supports 2 monitors on a y adaptor will as well.

For less than 100 also if not then you computer same card on your monitor in that socket if you have currently plugged in your monitor in that socket.
An adapter you have with an adapter you can get it for less than another.
An adapter you have to purchase new video card some are expensive but you computer same card on your monitor as far as software is concerned with an adapter you can get it handles well good luck.
The vga socket you have with windows xp this is default and it handles well good luck.

If you have Windows, why not just split your screen?