So I need to accept this job offer this week....

[celiboy]

Sounds like you are going for your CPA. Once you get your CPA there will be lots of opportunities to work part time (such as only contracting during tax season with a firm, opening up a small firm on your own, working for a non profit). There is a huge shortage of CPA's/CA's in North America. The next 3 years of your life will be hell as I'm sure you are aware of (due to the long hours of articling).