I think you are selling yourself short.  I work with a 125 seat theatre and instead of asking "what shows can't we do?"  We always ask "How can I fit all this on our stage?"  We only have a 42' by 20' stage with almost no wing space no real fly space (it's an old converted church) and we have never found that we could not do a show.  Be creative.  Find a show you like and make it fit.