It reads like a nice piece of kit! ...... Price?
$15 USD, for the antenna and 10 meters of coax, with both N and SMA connectors attached.
I figure that this kit wasn't intended for a point-point link like you want, more like feeding a bunch of remote Wi-Fi hubs - (but Hey! - any solution that works - is a good solution! -- my vintage Engineer's maxim!).
Unlike at 5GHz, at 2GHZ, you would will probably find that find more height is an advantage. Send me a Google Earth photo of the route, plus transmitter antenna location and height & the farm antenna location and I'll re-do an optimum path for you.
I was under a similar impression. Cheap and dirty, to accomplish the task. Like you said, it works. I'm still in Siem Reap, but will get the data when back at my desktop. I know where the broadcast antenna is. Just have to locate it on Google Earth.
I'm somewhat limited on height, unless / until I can secure another longer piece of coax. I figure, with where I want to mount the antenna, I can get away with a bit over 7 meters to the bottom of the pigtail coax on the antenna. That should put the top of the antenna about 8.5 meters off the ground.