Additionally, If any of you RE investors are in the Atlanta area, PM me!

The house is a 3b/2ba 1,895 sq ft home but an additional sunroom built in which brings sq ft up to 2,055 (based off tax records my agent found).

Only sell if you have to, or you can move the money to another investment that can produce a better return.If you keep it, you'll have additional income for life.

As far as I know, MLS access is only for dues paying licensed members, so unless you get licensed and pay probably $1000 or more a year, you won't be able to get direct access....and you'll also pay for some additional headaches. 

All thibgs being equal,, no agent can get you an additional $100k if comps are in the $550k range.  

Expand your network and explore social media events and make sure to connect with local lenders and brokers as it's beneficial for achieving your goals.

Alternatively, you could explore options like cash-out refinancing to access equity while keeping low interest rates and established cash flow, or a 1031 exchange to defer capital gains taxes and reinvest proceeds into a similar property.

In addition to Loon Mountain, there's a lot of rivers, hikes and scenic drives.

Do you recommend having additional savings in the bank, if so, how much? 

Lastly If you don't intend to live there you might consider a house manager, and definitely consider additional cleaning costs and parking.