Why on earth would an airline run a freelance Loadmaster course? Get yourself employed an then express a wish to get involved.
We at Cargolux have often been asked to run such courses - good money too. We always say "NO!". There is no way that we'd share our little tricks & hard learned experience with another airline. Why would we shoot ourselves in the foot for a few Dollars?
If you would get a job with us, I'd willingly give you 17 years of B747F experience. Some of my colleagues have double that. We however wouldn't sell it for anything...
I suspect other ailrines are similar in their thinking.