Congratulations :D
It sounds to me as though you've researched this breeder pretty thoroughly and are happy with her responses and health testing regime. I wouldn't be worried about this being an uplanned litter - it happens, including to reputable breeders (LOL - some of the 'best' litters have been produced from unplanned breedings - which can be very demoralising when the planned litters don't turn out as hoped). I also wouldn't be worried about whether or not this breeder had a waiting list - not everyone keeps one and (whether we like it or not) puppies are subject to the laws of supply and demand like any other 'commodity'. Sometimes everyone wants a flashy brindle male, and the litter turns out to be all female.
The only thing that would concern me slightly is that you can't meet the puppy first. But with that said, good breeders try to place individual pups into homes that they feel will best suit the puppy rather than letting people just choose. That is generally done by talking with prospective buyers about their circumstances, not by performing a 'home visit'. It could well be that your breeder has indeed decided that yours is the best potential home for that puppy. Doesn't mean there weren't any other options
As for the distance - well I don't consider that an issue either. If you deal with an honest person who cares for their pup's wellbeing then you shouldn't have any problems. If you end up with someone less than honest, well it doesn't really make much difference how close they are, you still get burned.
Anyway - it seems to me you've researched well, and are happy with your decision
So, best of luck, and enjoy your new girl
Hope it all goes well.
Debbie
PS: A three month old puppy should be fed a *minimum* of three times a day (4 times is better though, if you can manage it). By the time she's 5-6 months old, you could drop that back to twice a day.
