Core Viewpoint - The article discusses the decision-making process for purchasing either one 140 square meter apartment or two 70 square meter apartments, emphasizing the importance of individual circumstances and goals in making this choice [1]. Group 1: Purpose of Purchase - The choice between a 140 square meter apartment and two 70 square meter apartments should be based on the buyer's purpose. If the buyer has a large family and sufficient financial resources, a larger apartment may be preferable. Conversely, if the intention is to rent out one unit to cover mortgage payments, two smaller apartments may be more advantageous [3]. Group 2: Financial Situation - The financial capability of the buyer plays a crucial role in the decision. For those with a strong financial position, a single larger apartment may provide a more comfortable living situation. However, for buyers with average financial means, investing in two smaller apartments can serve as a better investment strategy, potentially benefiting from future price appreciation [5]. Group 3: Family Size Consideration - The size of the family is a significant factor in the decision. For a family of three, a 70 square meter apartment may suffice, while the second unit can be rented out, generating additional income. In major cities, the rental income from a 70 square meter apartment can reach 4,000 to 5,000 yuan per month. If the family prioritizes living quality, a larger 140 square meter apartment may be the better choice [7].