I'm good with the three points.
I see the build points as roughly:
Lab Texts: 0
Vis Sources: 150-200
Vis Stocks: 0-10
Enchanted Items: 0
Essentially, 60% on the library, 30% on vis sources, and the remaining 10% on the rest (specialists getting the greatest share of those).
I have no specific wishes as to the exact distribution within each category. Although, as I mentioned before, it is fairly easy to ass mundane books to the library using silver so it might not be worth using build points for those.
I'm a bit unclear as to how many build points we have exactly. We started with 150, then the "lab-in-the-box" concept adds 49 bp for each magus who will spend 2 seasons to install his lab himself instead of being ready right away. Am I getting that right? So if 8 magi do that, we might get up to 542 bp?