For the theoretical maximum it is 4738 Sessions at 20XP apiece.
If that’s one session per week for 52 weeks per year, it would take roughly 91.115 years to achieve that goal.
And I'm 47 now - meaning that I will die LONG before I get to this goal, barring some kind of Futurerama Head-In-A-Jar technology.
Alright, you guys suck extra for getting this one into my Brain. I'll finish tomorrow, but here's my initial numbers. SOMEONE needs to read my story and give me feedback to make up for this...stuff...* grumble grumble grumble grumble *