From what i can see it looks like you could do this with maybe 10 triangle "shapes", 4 rectangles and a couple of rhombus, all can be created with the shape generator tool, which can be downloaded form HERE, might take a few attempts to get used to it or you could find it simple. Once you have a section made that you are happy with i suggest you make a copy and store it in a "new" plan, you may need them to mimic the ceilings under the roof sections