How much extra money should I be borrowing?

I'm going to a private school in the fall. After calculating my expenses, after deducting the grant I received, and the subsidized and unsubsidized money, I'll owe about $10,971, I just got a degree before transferring (Dental isting), and while I'm looking for a job not knowing how long it'll take to find one, how much extra should I borrow, I have a meal plan at school, I'll be bringing my car for a job, and have no other expenses. So, again how much extra should I borrow to live on while looking for a job?