n=1
I started Bros back in September and am working through topics already covered in M1. Over the last 34 days I've put in ~47 hrs (~1.5 hrs a day) and have gotten through 12% of the deck (this includes the pharm deck that some people disregard). That means at my pace it would take about 23 15 hour days to go through the deck. That being said I am probably on the slower end of the spectrum when I do them. I usually do them early AM/late PM when I'm not my most efficient so you may be able to get through it much faster.