Moving out of state, moving closer to work, school or moving into a bigger home due to expanding family like "pregnant" and/or requiring additional rooms or larger GLA.If you purchase a 2-4 unit and try to purchase another 2-4 unit if they are not "Common" to the area you will have a hard time.

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).

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

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.  

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.

Yes, you can pay the additional amount to bring your loan amount to the maximum county loan limit.

These are professionals with additional training and a stricter code of ethics.