Not sure that the Mystery Machine logo is a good fit for a window van? The vans with all of the windows are more "people mover's", as JB calls them down south, used for touring around so everyone can see, or for picking up groups of folks, like a Church van? Maybe a nice logo, like a Lighthouse, with rays of light reaching out, and something like "Falcon's Home For Wayward Girls" in a nice script style font?