I installed oneafter being burglarized in Feb. Kind of a PITA to get set up but probably worth it. I don't have live monitoringbecause Idon't want BG's to realize they're being taped. It would be easy to run a wire fromthe output though.My primary purpose is to record anybody breaking in since the PD doesn't have much chance of catching someone unless they can find out who it is and if you have video the chance of sucessful prosecution goes way up.
Look at ebay for DVR systems and that will give you the names of several stores. A 120 gig hard drive will store 3-7 days of activity depending on the record rate you set. A monitor will show what is currently being videoed and allow playback. Little tiny cameras with at least 420 lines of resolution will work and make it harder for the bad guys to know they're being taped. Black and white cams shoot much better in low light. You can get a wireless system but it will run a little more, be more obvious and more prone to being shut off if the control box gets unplugged. Mine is just like a little dvd player with 4cam and 4 audio inputs and will run 4 cams at 15 frames per second with about 4 days of storage capacity. If I were togo on vacation I would turn off two cams or reduce the frame rate to increase storage for longer thenI would be gone.