I did exactly what you are proposing for three semesters, got away from it during our senior/final semester. It was hard. Things you will run into:
1. Routine daily "chores" become too much of a bother, you don't have time for them. Just spending time to get laundry done becomes too much of a burden on the schedule. My apt. was chronically dirty and I did things like dishes/laundry at odd hours. Often, had to choose between a good nights rest or clothes to wear for the next day.
2. You social life will suffer. This occurred to me for two reasons: A. No time to socialize hence people found other things to do. When I did have time (that one time per month I could spend a couple hours), it was impossible to make plans. B. I was a chronic grouch, working too much. Didn't really want to do much of anything.
3. Other responsibilities will get ignored. I often had the money to pay my bills, but couldn't find the time to sit down and fill them out. Didn't get my car registration done until just before I became illegal. Doctor visits were not going to happen, I was in the middle of getting a lot of dental work done and never finished it.
4. My grades were not what they could have been. A lot of my worked reflected a "thrown together at the last possible moment" style to it. My test grades were average at best because, I was too tired to recall things upon being prompted to. I understood everything, just couldn't bounce around from one idea to the other upon being prompted to by a test. I was getting high C's when I should have been getting solid B's or low A's.
I don't mean to paint a bleak picture, but this lifestyle is not for everyone. It had a simplicity/return to basics feel to it that I needed at the time. I am not sure I could do this again. You learn to love those fifteen minute breaks between classes, you start to look forward to that one hour at night where all your schoolwork is done and you can sit in quiet...............it really refocuses you.
During my final semester, I worked part time because life allowed me too. My grades went up, clinical instructors no longer considered me "the one that needs watching" (IDK why, it just happened) and I started getting along with people better.
If working AND going to school full time is truly the only way, don't let anyone talk you out of it. But if there are other/more realistic options............take that road instead.