Everyone had some really great info, as always
But I just wanted to touch a tiny bit on why hobby breeder is used.
For example, here in my state when you go to get a breeding license they have 2 categories. One is either a commercial breeder or a hobby breeder. A hobby breeder usually is, or used to be, for people who bred for show, which is their hobby. So it is basically how the term came about.
A hobby breeder who basically isn't making money, a commercial breeder is certainly making tons of money.
They just recently changed some of the laws here, but if you have 10 dogs or less you are a hobby breeder.
We also have to have a breeders/kennel license even if every single dog is altered. In my county we cannot have any more than 5 dogs without having a "kennel" license.. Even if you don't have a kennel you are treated as if you do. they seem to consider your home a kennel..at least mine anyhow since my dogs all live in my house..
Anyhow, that was meant to be helpful so I hope it was
Have a great saturday