I would recommend Dahua hybrid system in saying that thought his budget might be enough as you often need a poe switch to supply power to the cameras, i would ditch the analog and upgrade to CVI cameras (uses old cabling) but still gives you a 2mp option. ive used them myself and it helps bring cost down a bit, smart phone app is good and has built in p2p option so minimal setting up is required.
he will need a 16ch NVR to allow 12 cameras to be used
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