Generally speaking, the more people there are, the larger the house area is, and the more gas they carry, which is enough for a family. Otherwise, the house is small, which is not good for family fortune. On the other hand, if there are fewer people, the house is bigger and the gas field energy is stronger, and you can't use it all, it will also bring some adverse effects.
Unless a person really lives in a house, even if the house has a large space and carries a lot of gas, he can absorb it himself. Whether a person has good luck depends on his date of birth and the five elements of numerology, so I won't say much here.
In a word, you can determine the size of the house according to the population of your family. If there are many people, the house will be bigger, and if there are few people, the house will be smaller.