No money is exchanged whenever we do this. I let the guy who does it decide on what's fair to him, but I won't go over 50/50. Usually his decision is based on how much freezer space or canning jars he has and what his family neeeds.
Our deal covers rabbits and flock birds.
He does the awful part -- the killing, then I assist him on all the rest. I have to check everything for diseases before the meat is cleared safe for his family and mine. He brings buckets to take his meat home, and I go ahead and do my processing or cooking. Sometimes he will do the rabbits for a small portion of the meat and all the pelts.
My Great Grandmother used to get all the kids out of bed at 4 am to prep the chickens she picked out for the table. She'd do the awful part, and we'd do the rest. Guess that method just sorta stuck with me.
The City recently passed a law against backyard slaughtering, which in my opinion is idiotic. I can see a law that would guarantee safey and health as well as fencing that would block view to such goings on. But to ban it altogether is ignorant.
Whatever you do, it's going to be a very busy day for you, and likely the next couple of days will be very busy as well.