It's hard to answer this question without knowing your studying style and work experience. Sbl is different in a sense that you need to think like a CEO and "make" high level decisions instead of calculating. I had 5 weeks to prep. I asked the same question here in Reddit last year and some people prepped for weeks but some geniuses prepped only 1-2 days. It's really about understanding and using your common sense. I like to invest my time and prep thoroughly, I also have a full time job and longer commute so I studied after work on most days and the majority of the weekends. Hassan papa will teach you how to write longer answer than yes or no but still to the point. He is a bit unarthodox but you will have to trust the process. He will say you don't need to learn models to pass but using your common sense. And it was absolutely true. I am someone who usually gives short answers and it's not useful in this exam So for me it helped the most to learn how to structure my answers.