When John and Victoria Falls arrived in New York from London for a one-year stay, they did not bring many things with them. They had planned either to live in a furnished (配备家具)apartment or to buy used furniture. But they soon learned about a new system that more and more people are using. The renting (出租；租用) of home furnishings (beds, tables, dishes, and so on) has become one of America's fastest growing business. What kinds of people rent their home furnishings instead of buying them? Many kinds of people, international businessmen, government officials, airline workers, young married couples -- the people whose jobs may force them to move frequently(频繁) from one city (or country ) to another. They saved the trouble and cost of moving their furniture each time. They simply rent new furniture when they reach their new homes. Young people with little money do not want to buy cheap furniture that they will soon grow to dislike. They prefer to wait until they have enough money to buy furniture they really like. Meanwhile, they find they can rent better quality furniture than they can afford to buy. One family, who now have a large, beautiful home of their own, like their rented furniture so much that they decide to keep renting it instead of buying new things. But they don't like to tell people about it. The idea of renting home furnishings is still quite new, and they are not sure what their neighbors might think. This passage is mainly about ______.