Low basement ceiling issues

[Heath Thomas Jr]

hi all,

Considering purchasing a house that's a 2/1 and making it a 3/2 with a master bed/bath in the basement. It's an older Baltimore home so the basement is unfinished and the ceiling is probably only 6.5 feet at its tallest point. 

Does anyone have experience lowering a basement floor? By the time I add a floor and a finish the ceiling it would be way too small for most buyers.