The boy is the only child of the widower and does not seem to be interested in the same line of business and even when he does, he requires more maturity to be able to manage the business such as graduating from the college, etc.
To be honest, maturity does not come with the age but with the responsibility. I remember when my father died, I was 19 years old and fortunately I had a job where I was getting about $100 per month back then. The only mistake I made was, that I trusted some closest people who are my relatives but later I saw their true faces when I was about to start construction to build my own home.
So, my advice is, never to trust anyone. Not even your relatives. Do whatever you want, you will learn from your mistakes. Try to be a hard-working man and never think that you will earn like your father without working hard.