I think your success would depend on the demand in your area. It would be best to do some market research first, before investing in any equipment. You'd need a certain number, a rather large number of customers to make it worthwhile. There might also be zoning restrictions if you were to be processing a large number of chickens, and FDA regulations that would apply to those amounts.
You're right, Joe, that this could be a great enterprise, but perhaps not for everyone everywhere.
As for our BYC community, know that I'm in western West Palm Beach and I process my own meat birds. If you would like to learn how to do it, contact me. You would have to pay me a lot to make it worth my time to process your birds for you, but I'd be glad to process some with you -- yours or mine -- so you could learn this skill for yourself.