We bought a 150# pig from a guy for $25. He wasn’t too happy when I pulled out the .45 and popped it between the eyes. In fact he said if he’d known I was gonna kill it he wouldn’t have sold it to me. It was much easier to load up dead and it going to be in the ground cooking within a matter of hours. Had a big dove hunt the next day and needed meat and I was in charge of bringing the meat. It was some fine eating too.
I buy literal tons of meat for resale to a pet food manufacturer, who grinds it up whole. In cool and cold weather, I prefer to cull on pick up, but I always ask permission first. I also sell lots of livestock here on my farm. I would be ticked too if someone pulled out a gun on my property and shot anything, without asking first. When they ask, I have no problem letting them kill here, but due to the mess, I don't let them butcher here.
I bought a 400 some pound sow last year for $200.00, which included delivering it to the butcher. I have a market sized hog going in, in February, that I traded $200.00 in credit towards 3 goats for.
You can buy cheap oversized hogs at livestock auctions. You should be able to find the auction results for your local auctions online.
One of the Kentucky auction sites is:
https://www.bgstockyards.com/sales-info/market-reportAt 40 cents a pound a 400 pound hog would be $160.00. The oversized sows in those reports mostly sold for 40 cents a pound.
Private sales are probably a little higher. If you watch Craigslist, you may be able to get a really cheap hog.
Keith