It depends on the classes you're taking and if your professors are heavy on the homework or not too.
Usually I devote at least 2 hours per class, maybe more if I need to study for a test or maybe less if my professors are lenient and if the class comes easy.
You'll probably do fine when it comes to balancing classes with work. I took on two on-campus jobs and did fine. However, do sign up for loads of extracurriculars while taking classes and while holding a job - trust me, it's not worth it
