FWIW I had an in-law who was an outstanding salesman and whose father owned a very successful chain of shoe stores. The old man proved unwilling to let go of the reins and eventually drove wedges between himself and every one of his children. He destroyed the business all by himself and eventually went insane (thereby avoiding even responsibility for what he did).

I saw mostly the effect on the eldest son who was one of the best salesmen I've ever met. Have you ever met someone who could quietly tell you how something was made and of what it was made and still hold your interest? He could do that to an individual or to a class of students.

But the breakup with his father shattered his self-confidence and he turned to a series of minor managerial jobs in various production facilities. Today he's getting by, but I remember the bold and bright salesman that he was and smile.

I believe employment in a family business is a trap that can be very seductive but should be avoided. Children should always first go outside the firm for employment.