I have a 7 inch widescreen LCD that I got on eBay for $50.00 shipped. The video is ok, but is adequate for my needs. I'll suffer a little in the video quality for the ability to move the camera around, and it is a whole lot cheaper than most setups. The wireless camera with receiver was $149.99, the monitor was $50.00, and I got the trailer plugs for free from a buddy. I build a small voltage regulator circuit to drop the 12 volt to 9 volt, but the parts for that circuit was under $5.00. So, I've only got about $205 plus taxes and my time.