More findings from the affordable assisted living study The most affordable cities in Florida include Lake Mary, which ranks No. 1 in the nation costing $1,126 per month, and No. 5 Brandon ($2,076).

Florida, Tennessee, Georgia and Missouri appear most among the cheapest cities. Here’s the list: The 10 Most Affordable Cities for Assisted Living. 1. Lake Mary, Fla.: $1,126 (per month) 2.