Do you have anything in the way / in between the camera and the building? Trees? Parked trucks? Hills? etc. What's the terrain?
Btw, have you used Luxul before? Their XAP-1050 bridge shows an online price of almost $1000. That's pretty expensive for a 200 foot 2 camera link.
Among security integrators survey, Ubiquiti is the most common choice, especially for a ptp link. They are a fraction of the cost of the XAP-1050. See: Ubiquiti Wireless Surveillance Review
I'm browsing the Ubiquiti website. They have a ton of products. What exactly do you recommend for this type of project?
Is their a certain brand of IP camera that works better with wireless setups? I have a test system setup at my home that I have been trying different types of non hardwired camera setups on. I have tried cameras with wifi built in. I have tried plugging the camera into access points. I have tried powerline adapters. I have not been able to find a solution that didnt loose video feed at the NVR at least a few times a day.