My great grandfather supported a family of 7 making brooms. He didn’t own the broom factory. He was an employee, and was paid by the broom. My great grandmother stayed at home to raise 5 children. There was even enough to lend to the local grocery store, apparently. This was at the turn of the 20th century in Canada.
He would have probably worked 12+ hours a day, his children could have died of a toenail infection, their teeth would be falling out early, they could have been deformed by various diseases, many children died young or at birth, etc, etc.
I would never choose to raise a family in that period.