@Brianne H. Your analysis of the macro trends in Louisville is spot on! Besides the obvious benefits of investing in a growing market, the rest of the factors mean that you get consistent returns when investing here. The risk of wild variations in performance is often overlooked by many new investors. I'm glad to see that you accounted for it.
I'm certain the video @Clay Smith posted is a great source of info. I'll add some ballpark numbers here as well. There will obviously be variance, but these should be readily achievable.
C-) Cash Flow Areas (Fringe, but not war zone) - 40215, 40208
Price $60-100, Rents $700-1000, Cash Flow - $250-300 Appreciation - 1-2%
B-C) Cash Flow Areas (Solid Neighborhoods) 40216, 40258, 40272, 40214
Price $90-$140, Rents $900-$1300, Cash Flow $200-250, Appreciation - 3+%
B) Mixed Cash Flow and Appreciation 40228, 40229, 40291
Price $120-$160, Rents $1000-$1500, Cash Flow $200-250, Appreciation 4+%
A) Appreciation 40299, 40241
Price: $130-$180, Rents $1200-1600, Cash Flow $100-$250, Appreciation 4+%
As far as ROI, we still see double-digit returns on leveraged investments.
I hope this helps and feel free to reach out if you have any additional questions.