That would depend on a number of factors including: where in the coutry you are buying materials, how much of the scenery flies, rolls or moves, how detailed the realism is (is it all painted or are you carving all those rocks out of foam or homosote), and how much "stock" scenery the company has available to alter. Are you working with volunteers, interns or professionals. (Experienced help costs money, but inexperience costs more in materials.) Many times it's not a question of "How much does that cost?" and more a question of "We have $X, how do we make it happen with that much money?"