Cold calling, direct mail, social media advertisement, door knocking, agent leads, software and list providers are some of them.

Where can I find real estate agents who have access to off-market deals?

As an investor and agent here in Columbus Ohio, if you have any questions or want to connect, definitely reach out! 

The Agent Finder tool is a great way to find an investor friendly agent in your area.

I suggest you partner with an agent that truly understands investments and can help you navigate this market.

@Margaret MirasolaWe created a "Deep Dive" series here on our BiggerPockets blog about Metro Detroit cities, City of Detroit Neighborhoods and comparing Metro Detroit to other hotspots investors usually consider: https://www.biggerpockets.com/member-blogs/3094/99854-deep-dive-into-metro-detroit-cities-ecorse We're not aware of any other property manager, agent, turnkey provider, flipper or wholesaler that's made the commitment to do this!

As an investor and agent here in Columbus Ohio, if you have any questions or want to connect, definitely reach out! 

That one fact came from one of Lifestyles' successful real estate agents.  

The Bay Area Equestrian Network is a west-coast based equine version of Craigslist (super popular resource out here) and has a real estate section with active listings (or you can navigate to the listing agents' sites to see more of their properties).As @Bruce Woodruff mentioned, the money can border on obscene (basically it's the clients and/or investors that are really the ones paying for all of the fancy stuff the trainers have).

Then from there you should reach out to them, see if they have investor friendly agent, and if you find a good agent, you should be able to get connected to cleaners, maintenance folks, contractors, and more.