I need fairly complex surveillance systems for my shop. I need surveillance cameras for two rooms inside, the parking lot and the back of the store. I’d like them all to connect into a networkable 4 channel dvr that continually records the activity in these locations. I mainly want to protect my shop against vandalism outside, but as along as I’m getting a security system I might as well cover the inside as well. Once I have the basic set-up figured out, I think it should be just as easy to have four cameras as it is to have a two camera set-up.