The four walls are now attached in a row, 4A to 1A to 2A to 3A. Walls 3A and 4A aren't connected yet. Also pictured are the floor (6A) and the roof (7A).
Thanks for the encouragement. I remember Gomez Addams liked to crash his model trains into each other, but he was rich enough that he didn't care about the expense.
Wall (2A) with two different types of windows (15B and 15D). I wanted to keep the plants on the wall without cutting them, so the bottom two window frames aren't straight rectangles.
I decided to work on the Neat Sweet Petite model from Haunted Dimensions. This model is based on the Addams Family. The PDF file is 19 pages, 15 pages for the model and 4 pages for instructions.