Also, as i was browsing the land, I saw some kind of tent that was built with tarp, so there could be a possible squatter.

My wife and I like our current house but it's not our dream house and we are always browsing to see whats out there.

You can browse meet-ups created by members. 

All of them will let you visit in person and browse, as after all, that information is all public.

While the money coming in is good, I feel a little stuck...as if I have plateaued with my RE portfolio and now might be the time sell it and use the proceeds to invest in a bigger property with more than two units (potentially bigger cashflow).This idea hit me when I was browsing Trulia and realized that my property value was around $105k.

Browse BP for discussions on Atlanta and that may lead you to others looking to invest there as well. 

And browse the country.

Recommend browsing the site and reading as much as you can on the entire process of identifying, evaluating, and running income properties.Just because you have the money available doesn't mean you should invest.Smart investors invest for cash flow or appreciation (or both), make money on the purchase (buying below market value, adding value via rehab if possible), and manage conservatively (being realistic with costs, expenses, rehab, etc.).

As i’m browsing through and reading the different topics.

I'm assuming you're just buying the property only, and not the laundromat or any other business in the center.I can't speak to what a good cap rate is in your area, but you should be able to speak with a broker or even browse around online to find out if it's in the ballpark for that area.