Hehe.
That's similiar to what I have.
We're building up a library of anime and manga for our girls and hopefully, their friends and such in the future. Hopefully, we can spread the love a bit.
Gah, our girls are so lucky. I would have loved to have this much anime and manga at my fingertips growing up.
Here's a list of what we have so far:
http://www.geocities.com/jasujo/AnimeManga.html
I do agree with robot, though. You might be better off starting a library out of Japan. Japan is where anime and manga originate and I'm sure they already have their fill.
Having a library where it's not as available might be more helpful to anyone who would use it.
A travelling anime/manga library, like they have with some book associations, would be cool.