C.M.
Just don't do it. I know that is not what you want to hear, but there are already too many pets out there (purebred and otherwise) that can't be taken care of. There has to be some other way to make extra money.
The money that you would make would NOT be worth the time/effort/expense of breeding. Just take a look in the classifieds and a trip down to the animal shelter. There are just too many other dogs for you to make it "worthwhile". And you should know that I am not trying to be negative, just realistic.