I am not sure of tax rates in GA so that needs to be disregarded but insurance, repairs and maintenance, and property management will still be fees that will need to be considered.

@Guy Gimenez You indicated that you do not disclosure your status in your mail marketing,  Do you put any disclaimer such as "Please disregard if the property is currently listed with another agent" ? 

Finally I want to remind everyone of what the law says in regards to knowingly renting a unit to an illegal alien:https://www.justice.gov/usam/criminal-resource-manual-1907-title-8-usc-1324a-offensesHarboring -- Subsection 1324(a)(1)(A)(iii) makes it an offense for any person who -- knowing or in reckless disregard of the fact that an alien has come to, entered, or remains in the United States in violation of law, conceals harbors, or shields from detection, or attempts to conceal, harbor, or shield from detection, such alien in any place, including any building or any means of transportation.

I guarantee it will be a lot less headache than separating every property into its own LLC with separate books and bank accounts.From a tax perspective it wouldn't matter too much since I assume all of these LLCs would be single member an thus treated as disregarded entities, which means it would flow directly to your Schedule E.

(May not need to if disregarded entity)12.

And all these disregarded LLC could be owned by a single holding LLC, usually in WY, that will do all the tax reporting and give you the charging order protection to protect you from outside liability claims.

I've come across management agreements which are locked into place but for example don't have a floor at all, so they technically could walk or disregard duties / bookings and you'd be powerless to replace.   

Having multiple LLCs would imply that you have a critical need for all that protection and you have a team that knows how to maintain them properly so they do not get disregarded in a lawsuit. 

I treat the LLCs as "disregarded entitys" for IRS purposes so no more book keeping needed.

Your options are corporation, partnership and disregarded entity (which is the same as a sole proprietorshipO.