The picture is amazing, but after reading a few versions of the story, it's not what it appears.
I belive the pictures are real and the hog is really that big, but the fact that the kid shot it on a 2,500 acre hunting preserve with guides backing him up with rifles tells me that the hog was pen raised. I don't know the details, but it's common enough for domestic hogs to get close to that size, maybe bigger, on high protein diets.
Just guessing, based on having hunted around the world and on a few game ranches here in Texas, the hog was probably singled out as a potential monster at a young age. He was put into a small pasture and protected from other animals and hunters until her grew to such a size that they were able to sell him to a client for an amount to make it worthwhile.
I don't have a clue what it cost, but when I was in New Zealand hunting at Glenroy Lodge, the owner got a call from another outfitter who had the new world record Red Stag on his place. He said he's let it go for $300,000. A few months later it was in the hunting magazines that somebody had shot it and it was the new world record.
Good or bad, thats how allot of those really freakishly large animals get that big. The good side is they are always bread to others to pass on there genes just like horses and other domestic animals are bred to continue the bloodline. The bad is it's just to feed somebodies ego and let them buy there way into the record books.
Eddie