Backdrop prices are for undecorated backdrop only. 
For decorations I'd need a photo, text or email, of what you want to get you a price.
Round Backdrop: 8'Hx7'W
Hex Backdrop: 86.5"H x 100"L x 33"W
Log Backdrop: 8'Wx8'Tx5'D - 5" Diameter 
Corral Backdrop: 28'Lx8'Hx5'D
Metal Pillar:10' H x8' W x 12" Thick
White Pillars: 8' H x 25' W