The first goal is to determine how many cameras you will need. To do this you will need to survey the area you want to install the cameras in. Decide on if you are going to have indoor or outdoor cameras. If they are going to be outdoors, you will need to buy some weather proof enclosures to protect the cameras. This is of course to protect your investment from the elements and vandals. Another part of the indoor/outdoor question is the location of the cameras. Do you plan on getting wireless cameras, or having time hard wired to the building?
And as for the fancier options, you have to choose if you want black & white or color video. There is also the question of audio? Do you want to have sound as well as the video? It is a more costly option, but may be worth it.
Next on the list is the recording device. You can go with the VCR or the new DVR methods. With VCRs you’ll have to keep buying tapes, as long as they keep making them. And tapes wear our and break over time. With the DVR everything will record to a hard drive. The DVR will give you better picture quality and more options for recording and reviewing the video.
Then to view the camera angles, you will need a monitor. TVs are not ideal for being constantly on. In that respect computer monitors are a better option. It is also a good idea to try and match the resolution of your cameras with the resolution of the monitor. If you plan to view multiple cameras at once, you should buy a bigger monitor. Or if you have the means you can go with a multiple monitor set up.
Assess your needs and budget for it accordingly. If you need to slowly build up your security system, make sure you start with one that is upgradeable and can accept add-ons.