Yep. You begin to organize with components or groups. Sometimes you make layers sort of follow the groups or components. Scenes help to quickly show the layers (with the components you put there) that you want, in the style you want for different uses (e.g. "working" scenes to simplify and isolate parts, drawing-output scenes like each exterior elevation) I use dynamic components for windows--things like that only,so no help here. Just use the most natural or simple method for the walls until forced or inspired to something different. Look at Valiarchitects InstantRoof Nui. Once you get the hang of it, you keep a horizontal plane in the model (study the height for the plane--its' not the top plate, so that's odd), you can quickly rework the roof and details for changes to design, save roof styles.