The thing to do if someone has a feral hog problem in their area is to not go at this alone. get with the other farmers and ranchers in the county. A device like this could be bought through a co-op then shared around the county. Or probably even better since it would be hard to justify the expense of purchasing one of these on a 1 time or possibly even a 2 or 3 time use would be to contact the manufacture and ask if they would provide you with information of someone who does this professionally.
I have noticed a couple of game trails on my property that show evidence of hog tracks once in a while. I've never found any heavily rooted areas or even seen a hog on the property, but I know there are several in the county since we have an annual organized hog hunt in November each year. Just a few counties away they harvest a few dozen and sometimes as many as a 100 each year, but the hog population is nowhere near what it has become in other regions around the State or the country.