The risk of spending £105k and then having a 50/50 chance of Qatar Airways taking you on is enough to deter me. Subsequently then being trained on Qatar SOP's and practices making you unattractive to other potential employers is a huge risk with the debt then looming over you. What happens if you are not selected after 18months of training and have BBVA banging the door for £12k per annum or Mum & Dads 3 bed semi?
The quantitive data on the actual wages and the time it takes to get into the flightdeck is not communicated (even at the selection stage 2) and effectively you are at the whim of a government backed employer in a country with very limited or little employment legislation.
Unfortunately I don't have any better ideas but I have come to look at this from a realist's perspective and understand it to be just immersed in a lack of detail, luck and overall poor management.
The idea is great, the execution poor and the risk simply outrageous.