How much would an app like Zillow or Trulia cost to develop?

If you ever wondered what the price of similar application might be, here is an interesting article: https://www.byteant.com/blog/real-estate-app-development-how-much-would-an-app-like-zillow-or-trulia-cost-to-develop/

I believe it may be useful for some of you.
What do you usually include in your app development cost? Do you believe that features have a significant affect on your final costs?