Its depend on how many ir leds come with the camera.

U can DIY the cable by urself if u want to install. For Contractor they will charge u base on per point for normal house not banglo. The price for you to survey are around RM180 - RM250 per point including power point. If u want to watch activities movement just go for analog camera,dont hope u can watch the face clearly but if u have more budget and looking for good quality u can go for 720p or 1080p camera which is IP Cam technology. Timing CCTV at jalan pasar got selling cheap2 analog camera and they do have their contractors to install. If you are looking for HD CCTV Hi End u can go to Taching Electronics at lowyat plaza 3rd floor and they do selling analog cameras as well.