for years pilots in NZ GA have been bonded for a similar amount (over 2 years) just for jobs on BN2's
Try half of that, the fine "airline" your refering to "only" charge $10k for "training your replacement" if you leave within 2 years. Even a dash 8 bond is only $18k in nz for 18 months.
If you want to better your position in aviation and have $20k to part with then there are much better ways of doing it, or you could just give it too me. I cant really get you a job, but I will send you a christmas card every year.