I'll throw in one more comment. Timlab you said that the suggested cameras were out of your price range. I understand that everyone is on a budget. If you are only looking for cameras to provide a general "overview" of your property (ie you know someone is there, but you don't expect to be able to identify them), then even crappy cameras will probably work and obviously are cheaper than better cameras. If this is all you want, then go for it. You really don't need our assistance.
However, most of us install cameras because we want detailed enough footage to actually identify a stranger (ie good enough for police to use in court) in low/no light situations when most of the illegal activity occurs. If you expect your camera to be able to do this, you cannot buy crappy cameras. If you do, you are literally throwing your money away because they cannot provide the detailed footage that you want/expect. Not only will you have spent money on something that will never meet this goal, it gives people a false sense of security. Right up to the point where they need to use the footage due to some "event" that occurred at night and they realize all they have is a ghostly/blury image of a human-like figure that can only tell them what time the event happened but will never be useful in identifying the perp.
If you want anything better than a general "overview" camera then you are better off with even just one decent camera (because that is all your budget allowed) than 20 crappy cameras. Getting lots of crappy cameras will do nothing but produce lots of crappy results. You can always buy more decent camera as your budget allows, but you generally can't return your crappy cameras after you realize how bad they are.
We'll be happy to help you achieve this type of result.....
Or you can buy cheap cameras and get this type of result........
The choice really is yours to make.