Investing in a 1BHK Flat can be a good idea for several reasons: 

Affordability: 1BHK units are generally more affordable than larger apartments, making them accessible for first-time homebuyers or investors with a limited budget. 

High Demand: These units are often in high demand, particularly in urban areas, because they cater to a wide range of tenants, including single professionals, young couples, and students. 

Rental Income: Due to their affordability and demand, 1BHK apartments can generate a steady rental income. They are easier to rent out and maintain a lower vacancy rate compared to larger units. 

Maintenance: Smaller units are easier and less expensive to maintain. Utility bills, repairs, and upkeep costs are generally lower. 

Appreciation: In many markets, 1BHK properties can appreciate well over time, especially in areas with high population growth and increasing demand for housing. 

Resale Value: Given their high demand, 1BHK units often have good resale potential. They can be easier to sell than larger, more expensive properties.