The only real cadet programme from zero to hero is through OSM Aviation Academy, I believe was something like 136k euro with 737 TR included.
the last advert of soon hiring cadets is now the one about the self sponsored rating.
Inside source says is around 22k euro.
no idea if is worth a shot to pay upfront with the current Norwegian situation.
i would choose to get it discounted from salary on a monthly basis or even a better a bond.
i believe bond is only given to non rated first officers above 1500 hrs total time.
good luck people !