Do you need an aisle (corridor leading to the room) to buy a house? Also, the corridor in front of the house is very narrow. Does it affect the geomantic omen of the house?

It's certainly ideal to have an aisle, but it's not ideal if all the room doors are in the lobby. The narrow corridor in front of the house means that your front hall is small, so your wealth is not easy to come in and collect. It is suggested that a white light can be installed outside to attract money, and a yellow light can be installed inside the entrance (door) to gather money.