1. The plan is to have eight issues, one for each school of magic.
2. This is a good question! There isn't anything in #1 about that, because I've been working under the assumption that probably the campaign would be paused between issues. Each issue is modular, and from #2 on will include alternate layouts that treat the department as it's own separate building, so I think my advice would be to say that Brewkessel had been a campus rather than a single castle, and have the departments appear one-by-one rather than all at once. I'll think about it more and if I have any good ideas I'll include them in #2!