I actually expect it to work, based on multiple reports of similar POE setups working over multi segments of 100m each.

We are aiming for GigE speeds end-to-end, which is certainly achievable. The only real question is the PoE, but I think it too will be fine. If not, there is a passive PoE injector included with the AP, and there is 120VAC power available at that point (the far end).

My understanding is that PoE already "doubles up" the conductors for power purposes!

Cheers