There's a place out where I am that traps hogs and puts them in a 5 acre pen, then you can pay an hourly rate and take your dogs and hunt it. That type of stuff isn't for me, I'd rather take them to the woods. Might take longer but the results are far better in my opinion. Like cracker said, paying someone to take my dog for months to be trained takes away the biggest aspect of this sport that I love. I worry about outside training being as effective when its not done by who the dog sees as their "master". I also think that trust and understanding is built between you and your dog when its trained by you, over time things like that are needed for those hairy situations out hunting. Just my opinion.
I would be open to that as well. Come run your dog for a few hours for a couple bucks. I don't see the difference in starting a puppy in a good sized woods pen vs a block of woods that isn't fenced. I find you have more control to while training than you do trying to train while hunting.