Wow @rossana
Frist welcome to BP. Few words in your statement that sounded my newbe alert that I once was and that if you are not careful, will lead you to people in your path to financial freedom that will separate you from your money.
1. 70-80K range for a rental? In my opinion that is to high unless it needs no renovations. If you look at the current market rents (sec 8) in cobb county rents are $900 to $1,400 based on the amount of rooms. If you are getting a mortgage or using OPM (other peoples money) for long term financing (like most mortals do). You are looking at a monthly morg. Payment of $550 to $800 per month plus property tax, insurance, etc. You are looking for an additional $200 to $400 per month once you do the math this leaves almost non, or no profit for you.
I seek houses in Cobb county (I like short drives to my properties) were the NOI is $300 to $500 per month at a minimum. For this reason, I seek houses between $30k to $60k
2. Heavy renovations? Unless its a flipping, I don't believe in "massive renovations" $10k tops. Unless I acquire the property at a massive discount the numbers just will not work to buy and hold unless you are doing some type of "subject to" arrangement.
Run the numbers of a $80k hous with $20k to $30k renovation and you will see that current market rents are not sufficient to cover the debt and make a dicent profit for the amount of risk.
3. Don't need amazing tennents? I seek life long tenants. If you don't do the same, turn over cost will eat you up.
It is not my intent to put your hopes down ( I personnaly like to move with care) but the market is hard now. The only properties that currently meet my criteria without doing heavy marketing are in Austell, Mabilton, Powder Springs some areas of Marietta and Douglass Ville. I don't touch Atlanta since not familiar with the market and it is too long of a drive for my trouble.. Hope this helps