Also its impossible to work full time and go to school full time unless your work is extremely flexable because alot of classes are in the middle of the day and you would be virtually ineffective at your day job, unless you are just talking about a serving job or something after school, I am looking into getting a second electrical engineering degree while working a full time professional job and looking at the scheduling im going to be able to take 2 classes at a time at best.
I did just that. For one year I worked in a mental crisis unit caring for individuals with mental dissabilites working 11pm to 7am and went to school full time during the day. The second year 9-11 happened and was activated through the guard to perform homeland defense working 9pm to 5am loading missles on the jets and going to school during the day and sleeping when I could.
My second two years of school I had enough money that I did not need to work and only needed to take out minor loans (compared to a 140K) in order to get by.
Although this schedule is not sustainable, it is possible. It just depends on what you are willing to sacrifice in the near term in order to succeed in the long term. But anything is possible...