To be successful in this market and will probably be leader in any market, you'll want all two to three. You really cannot rely only on 'technology' you can do that for you. https://www.Digitaljournal.com/pr/news/press-advantage/central-phoenix-real-estate-brokerage-firm-axis-real-estate-invites-property-buyers-sellers-and-tenants-to-browse-its-listings