I've never paid to hunt. I don't know if I would ever pay to hunt whitetail; the only way I can really justify it is if it is an animal that I can't hunt where I am, and I basically have no chance if I don't use an outfitter.
But if I ever did pay to hunt, I would definitely tip a guide who busted his tail. If you can't afford the tip, don't demand the service. Its hard to say you "can't afford the tip" when you are paying $4k to hunt whitetail, a bit like going to a $200 dinner and then saying you can't afford the tip.