Hi
@Jasondevon
We would be very wary of using the system you have linked to for your requirements for multiple reasons:
1) HiWatch Solution - HiWatch is Hikvision cheap, consumer range which is designed to compete with brands like Swann, D-Link, etc... and so the build quality of both the camera housings and the hardware inside the cameras/DVR is cheaper and lower quality.
2) Spec Limitations - Looking at the spec details for the cameras & DVR in the above link it would appear to suggest that the cameras are 4MP but the DVR only supports up to 1080p (2MP) resolution and so you would not get the max. resolution from the cameras, also the cameras have a max. IR range of 20m which technically will reach the range you need but these measurements are always an 'up to' measurement which means that with a clear line of sight the camera can see to this distance at night but the clarity of anything at this distance will be low and any obstacles in front of the camera (e.g. trees, fences, signposts, etc...) that may bounce IR light back at the camera will also reduce the cameras maximum IR range.
3) Analog - If you are installing a CCTV system we would only recommend an analog COAX system like this if you either already had old COAX/analog cable and equipment installed or if you are in a very remote location without good network access. If you do have network access and this is a completely new install then we would always recommend installing an IP network solution, the equivalent IP solution to the analog kit linked above is listed below:
1 x
DS-7604NI-K1/4P(B) 4-Channel NVR
2 x
DS-2CD2345FWD-I 4MP Turret Camera(4mm)
2 x
DS-2CD2065G1-I 6MP Mini Bullet (4mm)
1 x
1TB Western Digital Purple HDD
4 x
20m Cat6 Network Cables