Hiya, Well three isn't too bad - I was worried it might be 33!!
You have my utmost sympathies here. I had to steel myself with whisky the first few I did, but after that it gets easier. The thing that worried me most to begin with was causing unnecessary suffering, but once I had been through it a few times, and was convinced in myself that I was being as humane as possible, it wasn't so bad. Unfortunately we've had a summer of breeding cockerels (10 boys and two girls hatched this year!!).
The pheasant shoot option is a good one, but how about getting some pheasants to practice with? (i.e. birds you don't know personally!) What we do with pheasants and spare cockerels is to open up the skin at the breast, and take out the breast meat and legs. This yields 90% of the meat, for about 10% of the effort of plucking and drawing. Pheasant recipes are also very good for cockerels, since they are far more 'gamey' than your standard supermarket chicken.
You're not too far away, so give me a shout if it would help for somebody to give you a hand.