It all depends on him and if he can handle it, and this is where time management plays an important role. Also when starting a business while in school, you dont have to pick a job that is time consuming. The best jobs are either part time jobs or work with your hand skills. I had a friend in school back then, he was a student and also a tailor, he was making serious cash, the least amount of cloths he sews where $100 upwards. I know so many other students doing jobs and studying not to mention the ones who train themselves with what they earn