I have the same story of many others here; struggled through school working 30 hours a week. Mind you, I had a 0$ per month contribution from my parents. I live with my bf, but in a SMALL one bedroom apartment. Our basic bills run us $1350 a month, allowing for $50 to go out for dinner once. This does not include any entertainment, medical, or incidental expenses either. Yea, it seems a lot more expensive to live than I imagined it as a teenager at home.
For your situation...well, the 2 recommendations I would make are 1) consider roommates. When I was in undergrad I paid $300-$400 to share a house with 2 or 3 others, and when I moved out on my own, it was $650+...so theres a good amount of money to save. 2) As much as you think you need to, stop driving. Gas, insurance, car repairs etc etc add up so fast...its easy to think you *need* to drive to get to work/school, but Ive yet to see any significant school that is actually unaccessable by public transit. Make one of your other friends the "driver". Maybe with changes like these, you wont need a part time job as $1200 a month from mom and dad would be enough. In my shared housing days, $1200 a month would have given me close to $600 buffer a month....certainly better than $11
(on that note, i know having roommates can be crappy and Im thankful to not have one now. Still, at 1 bedrooms renting at over $1000 here in downtown Edmonton, its not out of the consideration for the future....splitting expenses is a fool-proof way to save)