My experience as a mentor has shown me that many people consider a change in career direction at the key ages of 28, 35 and 42. One of the options for graduates is a return to academia to study for an MBA.
The emotional drivers behind this decision include a general desire to expand one's knowledge, the ambition to increase one's earning power, and the often-primeval urge to become an entrepreneur, to work for oneself, not someone else.
My advice is that a good education, while always valuable and useful in itself, is not a necessary pre-requisite to success as an entrepreneur. Most of the successful entrepreneurs have told me their stories of leaving school at 16 under a cloud without qualifications. Many are also dyslexic.