You might find Trapper who will do it for free. I don't think it's very likely because a serious trapper realizes you might have large numbers which means it's going to be quite an operation to get rid of that large number of hogs. Someone offering to do it for free, is likely to just have a trap that’s going to catch a few of them that they are going to eat themselves. This is my impression from having studied many people's websites and read lots of the state agency literature.

You'll notice most of the service providers listed are in Texas. You can see from reading their websites, a varying degree of professionalism. Does the website appearance correlate to the performance and results of the provider? Note: Jager Pro documents results of many of their projects. See my Cost/Benefit section where I summarize some of their and other people's results.