another option would be to go to one of the barbers in icmeler. i've seen a couple of men having their backs and shoulders shaved and they did a very thorough job of it and I don't imagine it's expensive.
if you opt for waxing, don't worry about the pain, women make it out to be a lot worse than it is. 3 of us at work had our chests waxed a few years ago for comic relief and all the girls at work were wetting themselves in anticipation saying we wouldn't be able to handle the pain but to be honest it was a walk in the park....now catching your wee man in your zip

well girls, that is pain
magoo