Hi Imran,
If as you say you can't apply for cadetship/sponsorship because of what you call citizenship restrictions then it is also more than likely that you won't qualify for a placing with CTC as most and I do say most and not all the airlines that CTC have "partnerships" with for cadet placements would have the same citizenship restrictions as the sponsoring airlines you mention above.
Just something you need to look into when fore spending your money.
Good luck.