We used a USB monitor - operating in extended mode off our driver station. Most come with some sort of mount and they are very light. No need for a 2nd power supply and also works if you have an IP camera on the robot. Our USB robot camera went to the DS while the IP robot camera went to the USB monitor (in browser). 2 cameras - no extra programming
http://www.amazon.com/ASUS-MB168B-Po...le+usb+monitor