I say train the dog yourself. I had a GWP which is very similar as well as having friends that all has GSP's and these dogs are a snap to train if they have the right breeding. Gets some books at the library if you cannot afford to buy some or buy some if you can. My training bible is actually a retriever book, "Retriever training your duck dog" or something like that. It is out of print but still available and hard to get one cheap so I think I am not alone in thinking it is an excellent guide. Essentially do easy types of training until they are 6 months then do more intensive training and you will have a dog that is very obedient to commands.

A little work on birds until they get the concept and focus on the training and not on getting game as much and in the second year you will have a great hunting dog. Those dogs were bread to go after rabbits and even fox so it can do it all if you train it right. My would go for rabbits if the hunt went on with no sign of birds. I think the hardest part of training is to learn how to trust the dog. I cannot tell you how many times I was steamed that my dog was pointing where there could never be a bird only to have a bird take off.

It really only takes 10 to 15 minutes a day for most of the training and it really lets you learn your dog and them to bond to you that I would only go to a trainer when there was an issue to difficult for me to figure out. If you have no time to do training a trainer might be needed but if that is the case you might want to think about having a dog like that when you have little time to work with it or take it out for runs.