Siegi's phone number is 918 492 8988 or toll free 877 492 8988. If I was looking for a processor that would butcher wild hogs, I would give em a call to find out.
I called them
$45 per whole hog, have to bring it in Skinned and Gutted. That covers any cutting order you want.
Sausage/summer sausage is an additional $2.25 - $3.25 per lb depending on which style you're after.
If you bring it in Quartered its $5 per Quarter for the processing.
That sounds like a pretty fair price to me.