I have not said requirements are not in place. I said it is unlikely to be asked for the 500k. UNLIKELY is not NEVER. The fact I and thousands of others have not been asked does mean something, it is confirmation of the rarity of being asked to show 500k.
Sponsorship is usually for dependents, kids/wife/husband. You would need to contact Jakarta embassy if they allow adult sponsorship. Probably easier if your father 'loans' you the 500k and apply yourself.