A torch is probably the easiest way if you don't have the setup to scald them (which obviously you don't.) Kill, bleed, hang up, scorch, brush, scorch, brush, hose, repeat until clean, cut off feet, gut, wash it down. A good stiff scrub brush comes in handy. Clean out the ears, nose, mouth, etc. You're using too much heat if the skin begins to blister. Try to kill the pig in a dry spot and when the pig is as clean as possible. The first round of burning works better if the carcass is dry and not caked with mud. Scorch as much as you can before hosing down the first time. It takes longer to burn the remaining hair once you've wetted it.
If you're good with the rest of the operation, this is the easy part.