Can you choose your own geomantic omen to build a dream westward journey?

Hello, the water distribution of the landlord's house is not your choice, but it is systematic and random. However, it is said that some experts in building houses can use purple gas from the east to improve the chances of building houses. As far as I know, the equipment needed by NPC to build a house must have five elements, including the time when you just started building and the time after building. I built about five houses according to this rule, one is purple, the other is happy, and most of the others are compatible with water and fire. I hope it helps you.