Commercial breeders... not only is cost a factor (they are often unbeatable on price locally) plus from what Ive seen of local breeder stock, they are very low quality, probably due to interbreeding ?
A couple of our local shops DO support breeders, and offer "sale days" for them to offload stock... but most are in a very sorry state
That's pretty sad, as well as embarrassing. If the fish I breed & sell can't at least meet, if not beat the commercial guys they get used as feeders. The same goes for other local breeders I know. If you can't beat Asian imports on most commonly bred fish you are doing something seriously wrong.
You are not going to be able to beat imports on price, you have to beat them on quality. You can meet commercial breeder's prices if you set up your gear right, with the proper setup you will beat them on quality.
I would have to breed & sell 4 times the maximum amount I do now to meet what I make as a tradesman, after deducting operating costs. This would mean having 4 times the amount of gear I have now, which is in my profile. I would have to do this consistently, year round, as during the summer aquatics sales slip down to near zero around here. To compensate for slow times I would probably be looking at 6 times maximum, with 6 times the setup.
Breeding fish full time, making a decent living at it is tough business. It certainly isn't the overnight take off like a dot com sort of deal. I know one gentleman, who retired a few years back, who took a few decades to build up breeding angels to a full time job with reasonable income. Even with 300 forty gallon tanks running he had to work a part time job to get decent health insurance.
As mentioned, you will make a few dollars on the side breeding, you will have a hard time covering the mortgage. If you are interested in involving aquatics in a career, look into the veterinary field. Baby boomers are getting older, companion animals are often a big part of older folks lives, this would include fish. The veterinary practices which include doctor with aquatics knowledge are few & far between around here.