There are some details that indicate whether a house is rich or not. Unless there are many repetitive items in the house. If the items are few and luxurious. Unless there are magnets of any kind in the fridge. If there are magnets belonging to the places visited and cities, we can say that the people living in that house are rich people.
If the refrigerator of the house has magnets related to everything, we can say that it is a middle-income family.