RISD for sure, although as Yo mentioned, it is out of your budget. 
But I think you would find many of the experiences there that you are looking for - wide student age range, many different departments/disciplines, opportunity to work in many different materials - definitely an art school experience. And the museum has an amazing collection of antique furniture. Providence is a great town, and the proximity of Brown and several other colleges means there is always lots going on.
Good luck. The cost of school now is completely out of control, IMO.