But the first step is to start learning.

Agree on most of comments - step 1 is understanding the seller motivation.   

I am wanting to build a rental portfolio of single family houses with the BRRRR method. 

Go to town hall and get business cards at the auctions most everyone that buys on the steps wholesales.

Same with retail centers I generally like 2 million and above and preferably 3 million price point starting.There is a difference between a retail center with 3 tenants newly built 1.5 million all NNN plus cam from an older 15 year old building with 10 mom and pop tenants with all different leases and types gross, NN,NNN,etc. and the buyer is looking for help every step of the way.

I am working with her nephew and he mentioned that he believes there is a reverse mortgage on the property.What is the next step for me?

Once you pull MLS data you will see that as well. 5th ward -- is a step forward where you can still buy raw land  and build and sell with early adopters who wants to be close to downtown ( a bit higher price compare to acre homes and without govt assistance) .

This method will almost always give you positive cash flow but you will end up being a little closer in proximity to your tenants which can be a downside for some people.

Below, you'll find what has helped me take steps toward my pursuit of achieving financial freedom through Real Estate Investing:PodcastsGeneral Real Estate investing (I haven't listened to them all, but these were very impactful for me).

What investing methods (buy & hold, turn-key, BRRR, flipping, etc)?