This passage explains why Estelle has been so keen to get to know everyone: she’s extremely lonely and essentially just wanted to throw a party. Then, she also echoes what Zara has said about apartments being homes, not investments. If she’s going to sell, she needs to know that this is going to be a home for the buyers—even if they do have to take out a mortgage to afford the apartment. As the hostages all agree to lie to the police, they again show how transformative the hostage drama has been for them. They’ve come out with new friends and a greater appreciation for getting to know complete strangers.