How dumb would a 20k loan be for just rent and bills.

I have been working 2 jobs for almost a year now and am tired. I wanna go back to school to be an lvn. I'm going to a community college and hopefully fasfa will help me with the tuition. I still am planning to apply to grant and scholarships. I will have about 8k saved up by the time school starts. I wanna quit both my jobs and just focus on school. My rent is relatively cheap for a 1 bedroom and my car is paid off. Once I finish school ill be starting between 24 to 28 an hr. I could easily pay 500 or more to my loan if I was making that much.