I'm thinking about purchasing a wireless camera for the barn, but the more I read the more I get confused. I have a metal barn and it is about 250' from the house. Some people tell me the wireless cameras will not work in a metal barn, but I did find this one on barncam.com that claims it works in a metal barn and transmits up to 500 feet. Has anyone purchased this camera from barncam, or can anyone give me suggestions on a good camera to buy. Thanks for your help.