your foundation should be in other things beside the bitch.
a program does not begin with buying a female -- it starts with years of information and experience prior to thinking about breeding and developing a true program that goes beyond male meet female = puppies
I agree, it does look like you are heading for the American show lines , and there is nothing wrong with that --
having been involved in showing and handling , and having produced champions , best in breed champs and ROM's , I have to ask , what show? because there is all-breed and then there is "specialty" -- favouring different versions of breed type interpretation . have you looked at Shawlein Fine Art & Purebred German Shepherd Dogs
Then I need to point out that the best show dog is not necessarily the best producing dog , that a champion title makes no comment upon the dogs temperament or breed specific characteristics --
I would also question the need for all immunizations by 6 months of age -- tons of information on this forum to check out .
Also 6 months is young to have prelims done and evaluated by. It can be done as a pre-purchase arrangement for security . Better evaluation would be after 9 months to one year -- for preliminary --
some expectation that the dog can finish and get a title ?
sometimes it depends on the area in which you are competing because animals are put up judged against each other , even the best of a bad lot , unless there is something glaringly wrong which merits a disqualification such as major missing dentition or missing testicles if male or overt aggression where the dog wants to take down the judge or overt shyness fear where the dog drags the handler and the ring steward and their table out while attempting a hasty escape .
Some finished champions would consistently place last when they compete where there is more and better quality competiton.
How the dog is handled , when you have seconds to impress the judges eye , means lots . You have to know the judges special bias , and you have to know what your dogs best points are --- showcase them, and you have to know where your dog could stand improvement and diminish those.