In a real estate agency, the one who answers first usually wins. A lead comes in at ten at night, nobody sees it until the next day, and by then they have already booked a viewing with another agency. And when dozens come in for the same property, the whole morning goes on working out who deserves a viewing.
And ready-made software has its price. It usually charges per agent, makes you work its way, and your clients sit on someone else's platform. Sometimes it is worth it and sometimes it is not. It is worth looking at before building anything, and if it does not pay off for you, we will tell you.