Use separate record types, page layouts, and sales processes for the Rental and Real Estate Teams is how the administrator should extend the Opportunity object to meet the teams' different needs. Record types are a way to offer different business processes, picklist values, and page layouts to different users based on their profiles or permission sets. Page layouts are a way to control the layout and organization of fields, buttons, related lists, and other components on a record page. Sales processes are a way to define the stages that an opportunity goes through from creation to close. By using separate record types, page layouts, and sales processes for each team, the administrator can customize the opportunity object according to their different requirements and preferences.