The 38k on BMI for Gold is only after you have already qualified Silver (ie need 18k+38k = 56k).
LH requires 100k (unless living in Germany then 150k) for Gold.
Note that qualification, earning, cost of awards/upgrades, etc all vary by program.
Eg some programs business earns 1.25 miles, others 2 or even 2.25 miles.
For more information see
compilation of useful *A data and links, and in particular
*A Gold comparison