The link I posted earlier will be the Ubiquiti Nanobeam 5ac units you want to use. They come in around $100 each and are rock solid. Configure them to talk to each other (simple instructions included in the kit) plug the "base" one into your home internet, mount on the roof/wall facing the fence. UI has a cheaper one, but its 4 times the size, and will look pretty weird mounted on your fence.
Mount the remote one on a poll at the fence, point it at the base unit, plug camera into the network jack on the remote unit, ensure both the camera and remote unit have power and that is pretty much it. At 1k distance with LOS, you can easily sit a 300+mbs which is super over kill for a camera, but who cares, just means a nice clear picture when you are looking at it.
Those trend units posted will most likely work as well, I personally do not have any experience with those, so I cannot comment on the product. I use those UI units in production environments for the hospital I work at. Again, rock solid little units.