Honestly, I think it would be less money to just get another pup.
I was going to breed my toy poodle but after talking with my vet, she told me all the pros and cons and the cons outwieghed the pros by alot. The big one being that it could kill her. I was no way going to risk the life of my baby for a litter of babies so at 7 months old she was spayed.
A year later we went and got another puppy.
Good luck with whatever you decide to do.