To me it looks like an FCG with a spider. FCG is a flying crank ghost. It is an animated marionette of sorts.
Just a gear motor setup. As for the vines, I think Allen H. has a tutorial on vines on his Stiltbeast Studios you tube channel.
Haunters have been making FCG props for years. This should not be too hard to accomplish and not too expensive either.
Let me know if you need more info.