1. From the architectural layout, there are houses in the courtyard. But now in rural areas, people generally don't live with the elderly after marriage, so in some cases, it is feasible to build only the main house and the west wing.
In this layout, the old man lives in the main room in the north, the eldest son lives in the east wing, the second son lives in the west wing and the servant lives in the south wing. The east wing is not suitable for living in some places, and may be used as a kitchen and storage room, so only the main room and the west wing can meet the needs of life.
3. If you consider the problem of geomantic omen, you can build a small storage room in the east to avoid the taboo of "running around".
Please note that the above suggestions are for reference only and should be decided according to your local actual situation and customs.