So, in my current campaign I find myself converting an old asylum into a combined orphanage and school... and as an Archivist I've got a lot of magic at my disposal. I've also got the Landlord feat with 250kgp to spend. So... what spells and items are best for this?
So far, I've got Unseen Crafter (day/level, creates a craftsman that builds things for you) and Wall of Stone/Iron (provides free stone and Iron) as my primary building sources. Divine Insight and Guidance of the Avatar provide skill bonuses for buying things. Stone Metamorphosis lets me turn my rock into Slipstone and Rock Gourds and other special rock. Improved Arcane Lock lets me secure the place quite safely while still letting minions handle the doors in general.
As for magic items, a custom magic item of Scholar's Touch allows students to read books instantly... great for their studies! A Pool of Scrying helps our party find enemies, and an Everful Larder means feeding people isn't an issue. But what else am I missing?
One important trick: having a portal that leads from the base to an Enveloping Pit I keep on me, so the party can adventure and get back quick.
JaronK