What would be the best way to create a group on Facebook for real estate purposes?

My realtor called the other day, invited me to become part of his “team,” (which consists of him, his wife who keeps the books, and one other woman, who does appraisals.) He’s going to help me with the licensing and getting started.
My first thought was advertising. My second thought was Facebook.
So, suggestions, advice, experience, etc. are very welcome.