Read several, but not all the posts so...if this has already been mentioned...sorry. There a probably several breeds of dogs, even mutts, that could be LGDs. One of the main keys to having a good one is to make SURE that it bonds with whatever it is to be protecting, and that is best done no later than when they are weaned. Typical LGD breeds like Great Pyrenees, Anatolian, Maremma, Kommondore, crosses thereof, etc. really shine for several reasons like size to deal with most predators and their haircoat actually serves as armor. They do eat a lot, but if you have a predator problem a good LGD will more than pay for itself. Numbers you quote for purchase seem high.