Saying having a job detracts you from study is a fallacy, doing a 10-4 shift every sunday wont detract from study time unless your already spending too much time partying.
I spend 3 hours a day driving to and from Uni (long travel route), have my daughter full-time and work Saturday and Sunday ALL DAY.
My Comp Sci term 1 results? 100%, 95%, 90%, 88% (still waiting on 1 to get back), I plan to drop one day of working a week IF my workload becomes too much, at the moment its manageable and I need the money to pay rent/bills/food.