Let's be fair though. I knew one person, personally and closely, that went to school full time, worked a full time job and raised two girls (they weren't babies or toddlers though) and managed to get a 3.0+ GPA, but that doesn't mean everybody can do it.

I tried (not the raising the girls bit), with a full time job and going to school full time and my grades plummeted for that semester (which caused me to have to retake a couple classes and delayed my graduation a semester).

Even in a Mid-Missouri small town, making 7-8 bucks an hour working ~24 hours a week, it wasn't enough to survive, let alone survive AND pay "cash" for classes and books.