I will have to say The Cobra 4 channel wireless system from Harbor Freight is well worth the $250. You have to have a 120v plug for the cameras, but the the rest is wireless. Very clear color pictures, Zoom, motion detection, Motion alarms, talk and hear through cameras, videos and pics stored on SD card, auto re-write and you can view through your smart phone with the My Cam View app. I bought one of these on the cheap to catch someone in parking lot being bad. Worked so good I added two more cameras and another system on the inside of the building. Over a year and a half and not one issue. I have the cameras mounted outside on the top of the building. I think depending on where they would be mounted, you would be able to read tag numbers if need be on zoom.
Couple of pics, I have the pic quality on the lowest setting, not high definition.
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