Just off the top of my head without doing more research the IPC-T2431T-AS and the IPC-T2231T-ZS probably would not make the cut for me. The former has a 1/3" sensor which is going to be inferior at night to a 4MP with a 1/1.8" sensor. On the later, it doesn't have a microphone as I recall so I'd rather have one with the option to turn it off. Kind of cool to hear the pitter-patter of the coyotes running through your yard and them calling out to each other. Really what you had ought to do is do a search on this forum or Google with the model number...for Google include "ipcamtalk" along with the model number....that way you'll get better commentary, comparisons, pros and cons.
In theory the Z4 would work yes, but it will be zoomed in about the same area. The target is the plate, don’t count on any worthwhile overview area beyond that. Think in terms of a dedicated plate camera that is likely not good for much else.
What kind of conduit did you use to run the Cat6 to the tree?
I noticed you had done an excellent job of tucking/hiding the wiring in the bark. I had to look close to find the wire. Any concerns about squirrel eating through the wire and did you do anything to isolate the wire to deal with lightning related issues?
I think if you get a direct lightning strike then you'll have more problems than just the cam system. I was thinking more about nearby ground strikes and voltages induced on metal objects like wiring due to the large electro-magnetic field from the strike.
