Group 1 - The article emphasizes the importance of carefully selecting properties to avoid potential pitfalls when purchasing a home, especially given the ongoing challenges for average families in affording housing [1] - It identifies seven types of properties that are advised against, highlighting their drawbacks in terms of livability and resale value [1] Group 2 - The first type mentioned is properties with ground-floor commercial spaces, which are often noisy and can lead to unpleasant living conditions due to garbage accumulation and disturbances from businesses [3][5][7] - The second type is mixed-use apartments, which tend to have a chaotic environment due to a mix of residential and commercial tenants, leading to safety concerns and higher living costs [9][11] - The third type is large-scale developments, which often compromise living quality due to high density, resulting in poor sunlight and ventilation [14][15] - The fourth type is rural relocation housing, which suffers from overcrowding, poor community management, and safety issues [18][17] - The fifth type is suburban new homes, which may attract problematic neighbors and lack promised infrastructure, leading to inconvenience [20][22] - The sixth type is vacation homes, which can be less enjoyable than expected due to environmental factors and seasonal tourist influx [24] - The seventh type is old, large apartments, which often come with high renovation costs and difficulty in resale due to their age and condition [25][27]