Hogs are a fast return. Yes, they eat a lot of grain, but they finish quickly. And ohhh, sooo good. I don't feed out any, but I buy a whole hog from friends delivered to butcher. Usually about $300 for a whole - finished, + butcher.
I only feed out my Sept/Oct fall born steers. Wean around Mar/Apr. I start feeding them some corn + oats around Feb in a creep area. This gets them started on grain + helps the cows that are bred and raising these calves all winter. I butcher them at 12-13 months old in October. Time is money! And, remember the younger they are, the more tender they are naturally.