How much do the Kunming Airport shuttles of mentioned above cost?

Hi, Travis.
As I know, the line 6 is not the closest one. Line 6 is not the most efficient one. The terminal of line 6, Dongfeng Square/KM Hotel is about 3.5km to your hotel.

The shuttle bus line 1 is the closest one with its terminal at West Inn (Nanjiang Hotel). Upon reaching, you can walk along the West Dongfeng Road to South Cuihu Road and then walk along the South Cuihu Road to your hotel easily. From West Inn, there is about 350m to your hotel.