This page will be a generic non-branded website that has nothing to do with you, your company, or your brand. This is more about what you do (real estate). The idea is to be able to promote content and information without associating it with a particular entity because it becomes something people can feel comfortable associating with and subscribing to.
Having a website or page associated with a sales person will scare people off and they are less likely to engage. You want to hide the sales person and make the audience feel like they can be a part of it and ultimately own it.
A Facebook page provides way more options on the navigation and functionality versus a personal profile page. I believe this is Facebook's way of making web pages obsolete and trying to keep people INSIDE of the Facebook Universe instead of the open internet or Google.
The primary benefit is the ability to pay to promote your posts where Facebook will allow you to determine your target and how much ad spend. However, you are never required to pay anything to use it if you don't use the "boost" option.
The main purpose of this page is to provide a channel to that pushes content you control without making it obvious you are a sales person or business trying to advertise to them.