1. I'm a novice at this stuff, but my recent experiences might help you.
2. I've always known about the 100m max for Cat5. We wired a parking lot with Cat5e. I'm running an Axis 213 and an Axis 221 at over 500ft. (over 150 meters). Cameras seem to be a little more forgiving.
3. I'm ALL DONE with Axis. Had a lot of troubles with pc's with the latest IE security updates and trying to install the ActiveX from the Axis cams. Their tech support, sucked. All Done. I bought a Panasonic WV-NS202a. Cost me about $600 less and the picture is just as good in my opinion. Actually there are a few features on it I like better. The IE viewer install, no problem. And I can save it on a flash drive and install it prior to browsing to save the download from the camera.
4. Do a search for AvalanWireless. My NS202a was over 1000ft. I bought a Wireless Videolarm housing for the NS202a and it works through a concrete wall into the network room of the building! They offer 5.8ghz stuff and 900mhz. The 5ghz stuff is strictly LOS. I used 900.
5. I'd opt for a few great ptz's strategically placed, rather than a boat load of "whatever".
But then, I'm still new....