Sponsorship or debt Mountain?
So £84,000 say 8% interest (CTC HSBC rate for EZY TRSS at height of financial crisis), 2 years training (nil repayment), 7 years with BA - repaid around £12k per annum.
So you end up paying over £34k in interest over 9 years assuming you make the grade and can summon £84k in the first place.
The Cathay SO deal might be a better option for cadets that wish to avoid upfront costs but then there's the cost of living in HK.