RE: small munsterlander & braque francais
The question you should be asking isn't how much hunting you can do but how much time you have to train the dog. Of the breeds you have mentioned, all are going to have breeders who are going to want commitments to test the pup you buy. These dogs are very versatile but to bring the versatility out one has to be ready to commit time to train. For what you hunt, any breed of gun dog, terrier, or a beagle, basset or dachshund would be a good choice. I think you would be hard pressed to find a better choice than a beagle or a dachshund. One would be surprized to see how much retrieve is in a dachshund. No matter the breed, the pup will not come from the womb as an obedient hunting dog. This takes time and exposure.
Doc George