For use in monitoring my front door

I'd like to mount an A1023 iSight Web Camera around my front door and hook it up to my MacPro in my office. I've read that the maximum length for a firewire cable is 10'. Since it will not be carrying a lot of data, I think I can use a much longer cable. Next part of the question concerns cost. Can I make a firewire cable? I've never cut into one. I know I have a box of old BNC cable around and certainly a box of Cat 5 cable. Could I cut a short cable and splice wire in? The iSight has a Firewire 400 and I can use an adapter to get into any of the four Firewire 800 ports on my Mac Pro. I already have an A1023 iSight camera set up for FaceTime.

Or is there a wi-fi device to hook up to the camera to send the signal wirelessly?

This would use a 6 pin to 9 pin connector.