The petticoat used about two yards, and the jacket was about three yards I believe. Each back "half" took up the full width of the material, so I couldn't maneuver much.
I do have an under petticoat on made of beige linen. Helps to hide the hoop lines and fill out the skirt.
I really try not to keep track of time, but the actual sewing wasn't too long. I'd very roughly estimate 15 hours for construction only. The draping took a while, but I didn't have a pattern to work from and I've never seen another jacket built like this.