I took my A & P I, II, III series over the summer last year. I did not work. I was in class M-R approx. 8 to 2. I came home, ate lunch, and studied until my husband came home at 6. Ate dinner, studied until 9. The next morning, I went back to class and took a quiz (every class day). It worked out to be about 30 quizzes.
I did nothing else. Read, study, quiz, repeat. Weekend...what weekend?
It can be done, (I got A's in all three) but it scares me that you are planning on working in addition to the class. Can you study while at work? There were others in my class who worked, but they struggled. The good new is, if you do the work, you can
retain the material. I was reviewing a patho book yesterday, and I remember an awful lot, so don't let the retention part scare you. If you learn it once, it will come back to you with review.
Good luck with whatever choice you make!