Whoah. That sounds tricky. I've often tried to mentally figure out how to make a lifesized puppet of some character like Jack Skellington or even Wilt from Foster's Home for Imaginary Friends. It ends up being too complicated, though, even in my brain.
I've bought near 30 yards of fabric for my costume, and I realized that I bought the wrong color for lining, some sleeve decoration, and that I'm missing red *crycry* I'm debating just dealing with it or spending even MORE money to correct the issue. How frustrating.