Ms. Yuan: The situation of my family is as follows: My husband and I are a remarried family, and we are both 39 years old this year. There are two 12-year-old children at home, both of whom are in school. The current property status of my home is as follows: We have a 90-square-meter house in Beicheng Qixuan, Yanghe Er Cun, Jiangbei (completed in 2005), which is currently occupied by my parents; We have a 120-square-meter house in Longhu Xi Yuan (completed in 2002), which we currently live in ourselves; We have an 80-square-meter house in the Longhu area (completed in 2004), which is currently rented out with a monthly rent of 1200 yuan; We have a 101-square-meter house at the Dagaokou LRT station (completed this year). All the above properties are free of loans. We also have some idle money on hand. Is the current property allocation reasonable? Is there still a need to buy another house? How can we manage it to achieve high returns?