To begin, learn all you can by reading books, listening to podcasts, checking websites, and joining groups like REIAs.

. :)If you are trying to market specifically to investors, join local investor groups (in person or on facebook).

Group insurance: Look for insurers offering discounts for insuring multiple rental properties or join a local landlord association to explore group insurance options.The key is to strike a balance between cost savings and maintaining adequate coverage to protect your quadplex investment.

If you are on Facebook I suggest you join local investor groups for the cities you are considering buying in. 

I pulled the trigger and joined Nate Barger's BRRRR Invest Academy. 

I recently joined the community and I'm evaluating a property with the rental calculator tool.

@Lily Rodriguez your profile says you're a real estate broker, if that's the case I'm shocked that you post on Zillow and not on the MLS for 2 reasons, one according to the association  rules you're required to list all your properties on the MLS (assuming you joined a association) second Zillow is not our friend, Zillow competes with us and tries to push clients to their Premier agents costing the listing agent half a month rent.Quote from @Lily Rodriguez: Marcus,If you want more exposure you can list it on the MLS, and you will have to pay a fee to the agent that brings you the tenant then you will have to do a credit check and background check yourself for each applicant however for my clients I prefer to list it on Zillow rentals only, because I can manage the applications directly from there and the prospective tenant only pays $35 application fee once and can apply for different properties with the same application fee.

We’re thrilled you've joined us.

I know many others looking to get into the game join communities like Jake and Gino and other syndication groups.

Join some of those and connect with agents, lenders, and contractors that will be able to help you!