Am I able to make social media posts regarding a deal that I am involved in?

This could be a website, some social media pages, signs, anything. 

I only have one tenant that wants to pay electronically.

@Nick Anderson it's the same reason the media pretends that every story is the end of the world and the most pressing situation of our time.

Nothing worse than trying to keep up with a key on the beach as I specifically look for units that have electronic locks and also feel it is safer.  

However vetting is important.Maybe do a little social media stalking to see if the story checks out?

Received electronic payment of rent for Property Y and recorded same into QuickBooks.

And, while you're doing so, tighten up your qualifying standards, require a security deposit and renter's insurance with landlord as additional insured, make payments due by electronic remittance only - get it set-up right from the start.The quality of the tenant is the quality of your return. 

Yes I have had success advertising through social media and also SEO via a website, though I've never heard of Chad Lower.

We live in a WIIFM (what's in it for me) and confirmation bias social media world.