Advise women to women. Take a nice shower, put on some nice make-up, shoulders up and hold your head up high. Walk to your man and tell him your getting a puppy. That you would love for him to help you search for one.
I think this is something you really want and he needs to support you on that. Find a vet that have low cost vaccines and research all you can on potty training and grooming. Show him you have done your homework and it will not be a burden to him.
Heck, take a shot of tequila if you need a little push to talk to him
Like my friend say's your a "household engineer", you have your rights.