Hi, i'm after a cctv system for my parents business. Its an industrial unit where its required and they would like upto 4 camera's, 1 or 2 outside and 2 inside one being in a large walk in fridge and the other in a warehouse. I'm a spark myself but never installed cctv from scratch. I'm after something a bit better than a diy one but not looking a big big money. Can anyone recommend any kits? Thanks in advance.