Since they get funds which can be used for construction rather than using their own funds which they have to borrow from the market, the cost of fund borrowed from market is much higher than the pre launch offer rates in which they already include their profit margin, but may be 10 to 20% less, depending on what sort of deal they get.Since they get funds which can be used for construction rather than using their own funds which they have to borrow from the market, the cost of fund borrowed from market is much higher than the pre launch offer rates in which they already include their profit margin, but may be 10 to 20% less, depending on what sort of deal they get.