I got into Homers for releases. We call them "Rock Doves" so people aren't offended by the word "pigeon." People are so ridiculous sometimes.
The wedding business didn't... excuse the pun... take off like I had hoped. We actually do more funerals than anything and that's terribly depressing. It is a beautiful service, though. Everyone grieves in their own way, and I imagine that the birds bring a lot of peace and spirituality to the funeral.
I was a teenager when I started it, so now with my own home and family, the birds remain at my parents' house and they keep them. They do sell squeakers every year, but I don't know if shipping would be cost effective for you.
Even without the release business making money, there are always people looking to buy the snow white birds. They pay for their own food just by reproducing. It's absolutely worth it. Plus, it's awesome to see a flock of white birds circling my parents' house around feeding time.