Advantages and disadvantages of living in numerous family

Nowadays numerous family isn’t as popular, as in the past. Why? I think there are lots of advantages and disadvantages of living in this kind of family.
In multichildren family all of child can rely on each other. Older sister helps younger brother. Younger brother doesn’t disturb older sister when she is learning. If someone doesn’t understand his homework, he always can turn for help to his siblings. All of members know about them duties. They all have to help them parents. All of boys help father in garden, al of girls help mother in home duties.
Now, let’s try to se some disadvantages of living in numerous family. I think, the bringing children up is the most valuable expense in all of people life. Otherwise, each child has to go to school, and need some books hefts etc. When we increase it for example seven times a sum is quite big. Often bigger than a salary of parents. Therefore, the most of multichildren family become a pathological family. At the beginning, children are jealous about all of things which have their friends from school. After that, they take up stealing. When they notice, it is bad, it is often too late unfortunately.
In my point of view living in two children family is easier than in multichildren family. Parents don’t have to worry about money and food for children