@bolueeleh, 100% behind you with what you said. Not sponsored don't do if you're Singaporean.
The saying "if you at first you don't succeed, try, try again" only holds true if one stops at apply for cadetships. Getting your license, then trying over and over again to get a job overseas to build time to finally come back to Singapore? 1% chance.
Save that money and don't put yourself in a potentially quarter-million dollar hole. You already have a HDB flat to be on the hook for.