He could have saved up money and be living off of his savings while working full-time, and the amount of money that he is being paid by his customers might be l

He could have saved up money and be living off of his savings while working full-time, and the amount of money that he is being paid by his customers might be less than the sum of his business and/or personal expenses. Not saying that such is the case here but just pointing out that it's possible.