first check with your game laws..get a depredation permit..whatever. with one you can shoot at night in california.
and then buy this, much cheaper than night vision, it double as a flashlight..this is what the trend it turning too. this is just one example. i think the prices really vary. i cannot remember the model i saw some pro hunter types testing..but i dont remember it being this cheap.
hog hunting lights, feeder lights, blood trailing aids