What I suggest after looking at the project file is to use shape layer strokes. What I did is convert the AI files into shape layers (yes, it keeps the animation) and turn off fills and turn on strokes. Then in the stroke option, click the plus button for dashes. If you want the lines to move, use the time expression on offset. I suggest that you make another house and simplify because it adds the stroke into all the doors and windows and I don’t think you want that.