I have lived in Cartersville for almost 20 years. Of course, since many families have been here since before the "War of Northern Aggression", that means I'm still a newcomer to the area. :) lol
At this point, I don't have any REI other than my residence, but have been following the market closely since January when I decided to begin RE investing. Based on what I have seen, and more importantly, feedback from an experienced Realtor / investor in the area, vacancy turns quickly. I think 8% / one month per year should be plenty for most property types. With 3/2 blue-collar type SFH, I think it would be lower than that, as they will often stay longer than one year.
This area has a strong blue-collar labor market. Bartow County is bisected by I-75, on the corridor between Chattanooga, TN, and Atlanta. We are approximately 1/2 way between the two, so transportation / distribution is a large job market. Additionally, NW Georgia is home to many flooring companies, and other manufacturing industries.
We are close enough for people to drive to Atlanta for high-paying jobs, and far enough away that property isn't TOO expensive. Property appreciation values have increased over 11%, and population has increased over 4% the past decade. Median house prices are $165k+. I have found it challenging to fit the 1% rental rule for new on-market purchases, but if you can find off-market, fixers, or if you have owned the property for a while, you have a good chance to get 1% rent.
Let me know if you ever need "eyes / boots on the ground" in Bartow County or contiguous counties. I'm a new investor, and am ready, willing, and able to help and learn. I can take photos/videos, work on comps, help you find local vendors, etc.