I have had several self trained hunting dogs over my years and I am not a pro, the dogs were ok. Six years ago my wife bought me a Wire-haired Pointing Griffon for my birthday. I was going to go down the same self-trained route when I got him. For some reason I called the trainer, Ben Garcia, at Rocky Mountain Roosters, Calhan CO, just to get some info.
Long story short I wound up putting my Griffon in training. My personal opinion, this is the best thing I ever did. This dog is the best bird dog I have ever had, hands down! Yes, not cheap, and I had to learn from the trainer also. I probably have $2K in training. The first year Griff spent 3 months (November - January) at the kennel. Then I hunted him from Feb-Apr. Back in training at the kennel from Jun-Sep. According to Ben, for my use, he was done. Mind you I am a hunter and do not do field stuff even though I would not mind trying it. Again, I had to be trained along with the dog.
I am sure a lot has to do with the breed but Griff is awesome, every year (like most dogs) he and I get better with each other. I use the Garmin Alpha for a collar as Griff also goes with me on horseback. We walk morning and night, about 5 miles a day. Griff probably does twice that.
We were out pheasant hunting yesterday, awesome points, flushes and retrieves, 7 birds. We went to Kansas in January with a cousin, 24 birds in 3 days between the two of us. My cousin's lab, a duck dog, had a very hard time keeping up. Griff was a machine.
Just my 2 cents, but I would do it again.
Ben Garcia, Hideaway Kennels,
http://www.hideawaykennels.com