Hate to be the one to say it.......and i dont mean it in a harsh way, but i dont think it would be very hard to come up with alternatives to keep your furry family member and try your business venture at the same time. I dont know your entire situation, so i could be wrong, im just trying to help you out as im sure its tearing at you. You look like two peas in a pod in your avatar.
Can you board the dog during daycare hours
Can you bring her to work with you during daycare hours
Can you find someone that would dogsit during the day and pick her up after work
Do you have a large property that you could put a small kennel away from the house
She looks good with kids, could you introduce clients to the pup and show them how docile she is and maybe use it as a cuteness tool to draw cleints
Could you explain to your wife that you took on a responsibility to care for this animal and daycare can wait a few years?
I dunno, just trying to help ya think. Gotta be a way to keep him in your family