Hi,
Mali is one of the cheapest country in west africa ! But it's depend on the style of life you wanna have there.
Transport : you have buses for about 175 cfa ( local currency ), taxi: to bargain ( but anyway the maximun price into the city is about 2500 cfa
Doctor: there are many private hospital if you dont wan't to public one ( there 3 bigs now Ppoint G, Gabriel Toure, and Hoptital du Mali trough the city
Housing? it's depend also, 3 ropoms is about 150.000 that's can be highest, normal one
etc,
Food ? it's cheap also, you have for 250 cfa to 2500 in the normal restaurant
Drink? beer is about 500 to 1000 cfa in the normal pubs. So, you have the choice