We had a guy in our class that worked a 40 hour a week 3rd shift job at a fortune 500 company.
This guy would work 11:00 PM to 7:00 AM. Get off work and get a cup of coffee and a donut on the way to school. Then he would be at school from 8:00 to 4:30/5:00. Then after all that, he would go home to his wife and 2 kids!
This guy was amazing! He did not tell anyone what he was doing because he though the school administation would hassle him. He graduated on time and in the middle of the class.
I don't know how he did it!