I was wondering if there exists a video device that could record 24/7 but draw very little power? Would also be nice if the device could automatically delete older footage to make room for new footage...thereby making the device practically maintenance free. Hopefully can store atleast a day worth of video. I could easily rig up the carpc to do this, but the high power consumption makes it unfeasible for 24/7 operation. What do you guys think? ...