...clock all the 1500 hours to apply for FO positions instead of becoming a cadet?
Last I checked, SIA does not accept Direct Entry FO (DEFO). I haven't been following this thread, and I don't know if you are working towards flying for SIA. This is for your info only.
With 1500 hrs you are likely to find a place in the right hand seat of one of the LCCs, provided you have the type rating of the aircraft that they operate. But why 1500 hrs? Did the hiring requirements state 1500hrs? Or did you confuse yourself with the 1500hrs required to 'unfreeze' the fATPL? Good luck guys!
9V