More to explore:
The Hogwarts Library by ~lurakitty on deviantART
Have a Hall of Portraits for staff members in the training rooms. This will help people get to know each other and also allow them to be creative with their portraits.
Looks like Hogwarts to me. It's the University of Michigan's Law Library. Beautiful!
Go out on the Lake for a fun day off campus. Use this time to teach staff members the importance of safety and that they need to be prepared for anything.
This should be Rowling's next project
My entire house will look like the inside of the Gryffindor common room. That's assuming I have any money left once I've finished buying my Harry Potter wands.