I have completely eliminated pigs from a moderate sized ranch. After months of constant pressure they finally moved on.
25 years of hunting hogs (trapping, shooting, snaring, running with dogs) has taught me a few things about feral hogs.
1. Anywhere they are firmly established...you will NEVER be rid of them. Using words such as (eliminate or eradicate) in the same sentence with "hog".... should be avoided...as it is wishful thinking at best.
2. It is possible to temporarily displace hogs (they are smart animals and adjust to hunting pressure), but I can say with full confidence, you have only succeeded in swapping hogs with your neighbors. They will be back, they always come back.