Hog Hunting/Traps

Looking to buy/or build a hog trap or two. Any advice as to what works? I have seen some have success with the rectangle wire traps with a closing door. Any advice on other options or ideas that my be cheaper?

Also, now that all my friends have recently purchased AR's they want to know what they can hunt with it. Hogs. We have a large hog populaiton on our property, but they are even more nocternal than deer. Is there any good tricks to getting ht ehogs out in day time. I know berry jello and sour corn work well for bait, but I only get night time pics.