I'm guessing the finals is going to last us 3 years.
Well, I'll be optimistic and hope for about 2 years ... let's say on average about 1.5 chapters a month (schedule is twice a month but given how often she's missing issues, taking a short hiatus etc that should be about accurate). So that's 18 chapters a year.
If we had 4 chapters on average for vanguard - sergeant - lieutenant rounds that's 12 chapters. Nodoka and Saki might get 8 each, which would be 16 = 28 total. Hopefully there will finally be some background story chapters which also probably won't come to more than 8 chapters. Otherwise there'll be the usual flashbacks to events in the player's lives, undoubtedly. So 36 total, exactly 2 years. Sounds about right. ^^