Hi Leslie!
Thank you for visiting the Moms Panel!
Disney's Art of Animation resort opened this week, and looks amazing! I think this would be a wonderful "value" resort to stay in. I can confirm that this resort does not share buses with any other resort.
Time taken travelling by bus to each park:
To Magic Kingdom: 22 minutes
To Epcot: 15 minutes
To Disney's Hollywood Studios: 15 minutes
To Disney's Animal Kingdom: 20 minutes
Please remember that all times are approximate, and don't forget to include waiting times at the bus stops.
If you have any other questions, please come back and ask me - I would be happy to help you plan you magical vacation!