Hi Mantaro 85,
To answer your questions, I am working for a cargo airline, FO on a 744, the base is Europe and my net pay this year is 46.000 British pounds NET + Expenses......
You can see that I can not be interested at all by the SIA cargo pay and conditions even as a Capt.
Good luck to you anyway if you can afford to work for them, I can't!
Cheers....