Marc,
another option I can suggest is webcam(s) and a cheap logging
and motion detect software running 24/7.
I've done this recently and after a bit of tweaking of the
motion detect sensitivity it works well.
Limitations are obviously:
- you need a rock solid pc that won't crash
- a nice large HD,
- limited with distances from pc to webcam (but you can network them over a hub)....
but the benefits are that it has a time stamp, can be uploaded to a
URL on motion detect or run an app.
Here's a good start for software...works very well.
http://ispy.developerinabox.com/
As far as hard wired video cameras and a multi-cam head end (a multiplexer),
I have also done that too.
I good start would be the Jaycar setups suggested so far by Sam.
The cameras are the key to good footage for criminal evidence.
Again, good cameras suggested so far by Sam.
My only other suggestion in regards to the darker driveways where
IR cameras seem the only solution.....use sensor lights to bathe
the area in good light...a daylight colour camera works well and shows
skin colour, clothing, features, car colours/ number plates etc better than an IR camera at night.
FWIW.
Steve