Ask YC: "Can a 40 year old, married with 3 children, start a start-up?" 18 years ago
Sure you can. Here is a write up that shows that most of the startups are done by older educated people.
http://randomthougts101.blogspot.com/2008/05/education-and-t...
The young college drop outs starting extremely successful companies is an exception not a rule.