Well, the thread has degenerated pretty far so that even as little as I know will appear intelligent.
I would not spend much money on a hog trap as they are very smart creatures and learn rapidly ( more rapidly than your average amateur hog trapper).
You will most likely only be successful one time with a trap and once the pigs find some of their kin in the trap they will avoid it. New pigs moving into the area may be caught sporadically but the locals will not be. I saw a lot of bated traps in the SC WMA and none of them had any pigs in them and the corn was all old.
If you have enough land to move it around and change baits you may have more success.
If you have an AR lower, PSE makes a 400 fps cross bow that fits on it and is capable of shooting one inch groups at 100 yards. Price is about $1K. Requires very little practice to become proficient.