We have a small USDA inspected slaughterhouse not far away, but it is running as hard as possible to keep the local markets stocked. There are a couple mobile slaughter operations that will coordinate with butchers to get your cows and pigs done, but they are not set up to shave hogs. They'll take the head and hide as partial payment, but I like to smoke the jowls along with the hams and sides. If you have a front loader or a couple buddies and an old metal bathtub you can build a fire under, you might take care of slaughtering a hog yourself, then haul it to the butcher to get cut and wrapped or cured and smoked. Getting rid of the offal is the only real problem.
Homegrown pork can really be premium, since a pig tastes like what it has been eating. A few years back I cleaned out an oak grove by pasturing pigs and goats in it. For two weeks, the pigs quit coming to the trough. All I could hear was crunching, I suppose acorns and snails. They did a great job cleaning things out, but pigs on mast are strong flavored. I finished them in the fall, on apples, garden vegetables, corn, and junk milk. The flavor was wonderful!
Best tasting pork I ever raised was fed restaurant scraps, boiled barley and a ton of outdated baby formula. You could almost hear them grow.