You as an intermediate can earn an easy monthly income by owning a similar Trulia Clone.
With the application support, Trulia also provides information regarding the crime reported in that area, commute, schools, and nearby business search as per ZIP, City, State, or Country.
They are using third-party service to show information according to their customer need like for Crime Reports of any particular area Trulia is using SpotCrime data to show in Map format to understand the crime in that particular area.
For schooling, it uses GreatSchool data to show nearby schools, courses provided and the rating and review of that school.
So that user can easily identify how anyone could travel to any properties in a given time period.
It will also help to calculate mortgages and help connect buyers and sellers to the real estate brokers or agents.