Doublemocha, breeding was never something we wanted to do but we foolishly left our dogs with a friend when we were on holiday. It was not until our labrador started to show signs such as plumper tummy that we were told by our friend that the labrador and the collie had mated 
We went ahead with it, and are covering all the costs ourselves, with new owners paying only a token sum. Friend did help to cover the bill for the emergency c-section and aftercare, which was only fair really.
Breeding is really hard, so many sleepless nights! Thankfully our bitch is an incredible mum, but due to her surgery we did do some hand rearing too. Every hour, on the hour, feed and rub tummy, then wipe away mess. And of course she went into labour on our bed, under the quilt, on top of my legs...
Food bills now are what they would be for ten adult dogs, the puppies just get lots of little meals. Expensive but worth every penny. The hardest part is the rehoming. We have followed the Puppy Plan with them and have been socialising/desensitising from the get go. So they are very well rounded puppies. Rehoming, well we were very particular about homes and have found some great families. I did turn several people away, some due to them being completely unsuitable for any dog, most due them needing a different sort of dog.
I have suggested checking rescues to everyone who enquired. One family had been to several rescues but found only difficult dogs available and did not feel they could handle them - all the sort of dogs they liked were already booked.
We are giving the lifetime return option and will also be available to help with training. So it is a lifelong thing for us now! We have made good friends with the new owners, but if I had to do it all again, I would never have left our dogs with that person. Breeding is just so hard and emotionally draining. I do not recommend it, but if anyone is ever in our situation, it is possible to do it! Just don't expect to make money, and buy a very good mop - you will need it!
Our little special pup is currently curled up asleep with his mum next to me. At least, I think he is asleep, he is relaxed and making little running motions. His eyes are open so it is hard to tell at times. I love him, but he reminds me that we took the decision that any pup with health issues was our responsibility. It could so easily have been the whole litter, or they could have had bad hips, though both parents are good that way. All the things that could have gone wrong, it really is not worth breeding, unless you have a very good reason or are left with no choice.
Treasuring every moment of it though. Amazing thing to experience. But so very, very difficult, expensive and dangerous. We almost lost both mum and her litter due to complete primary inertia. Vet has been incredible, we have since changed all of our dogs over to him.
Vizsla puppy incoming...lucky you