I've always been pretty suspicious of the Art Institute, as it's a for-profit company much like DeVry or ITT Tech. The upside of DeVry and ITT is that I'm guessing you have a pretty good shot at landing a job in an IT department after you graduate. The same cannot be said of anybody with a degree in a creative pursuit..there's just too much competition out there.
I'd say a much cheaper option would be to check out night classes at one of the local universities here, especially one with in-state tuition! Back in LA (where I moved from in January) UCLA Extension had great classes. Before that I lived in Pittsburgh, which had an incredible media arts center that offered training. Atlanta has Image Film & Video -
IMAGE Film & Video - but they seem to be more focused on running the festival and don't offer classes. Still, maybe somebody there could direct you to some good training.
Once you have the basics under your belt after some classes, you might just go ahead and buy your own Final Cut Pro system--I recommend this over an Avid strictly due to the difference in price. And by "Final Cut Pro System," I'm just talking about a Mac and a copy of Final Cut Pro. You don't have to get the quad-core-super-gigawhatever Mac, pretty much anything they sell at this point will run FCP.
Another thing to keep in mind is the eventual goal of getting a job. Video opportunities exist in Atlanta, but let's face it...it ain't exactly Hollywood. I recommend trying to ingratiate yourself with some prospective employers, like Turner or one of the local TV stations. You might be able to find some low-level work in the tape library, or even an internship. (Yes, I know it's hard to think of an internship at 45, but working for free beats paying the Art Institute 30 grand.) You let them know from the start that you want to be an editor, and they'll probably let you mess around with the equipment after hours.
Hope this was helpful...I'd love to be more specific, but I just got here myself!