I heard that BP did have something that brought together investors but I don't know what happened with it.I would really love to create something similar that EO (entrepreneur organization) for real estate investors. 

You can find different strategies on how to find and reach these folks, such as driving for dollars, targeting mailing lists, networking with Realtors and other wholesalers, and having an online presence, plus paid social media ads, etc.

My background involves social work & non-profit management before getting into real estate.

Also, staging and professional photography can help potential buyers visualize the space better.Lastly, think about local advertising—social media, networking, and maybe hosting an event for local agents could help get more eyes on the property.

I do occasionally post about it on some of the social media sites for travel nurses, such as Travel Nurse Gypsy Housing for example. 

Even he just leases out his "RDPD" brand, an ethical entrepreneur wouldn't partner with a scam team!  

Probably won't be back until sometime Sunday - social hours afterward.

We used to use them for direct mail, email, and social media ad campaigns. 

I believe the sponsor still is on social media going about their day to day

Most serious and qualified tenants are searching on the major 3rd party platforms you mentioned + realtor.com, redfin, and a few others.Apartments.com & homes.com are owned by the same company and may offer some additional marketing options.Another strategy to consider here is social media - video marketing.