How much will a sreen iguana cage cost?

its not a cage but i have a closet with nothing in it and no doors, i want to put my iguana in there to make a bigger cage so i need to make basically a screen door out of wooden 2 by 4s and screen in the front with door hinges and a lock on the opposite side and on the inside i need about 4 shelves very durable and the measurments of the door should be 80 inches high and 72 inches wide