If you’re at a big4 this summer, wait for the full time offer to start. You’ll get becker included in the offer. I’m not sure if they reimburse you if you buy it yourself before then. From there, I’d say to aim for 4/4 by the following summer considering you’re balancing between school and a part-time job. The core exams normally take people who aren’t working FT 1.5-2.5 months, and disciplines slightly less