Join the RSAF, fly with them for the MTE or minimum term of engagement. Once you finish, CAAS has in place a long course, short course or helicopter conversion/RSAF <700 TT (fixed wing) depending on what you flew and how much you flew.
That is the "cheapest" way to become a pilot, and the best part the first 2 years counts as your national service, OR, if you wait LOOOOOOONNNNGGGG enough, you might be able to try for Singapore Airlines, but who knows, I might be dead by the time they open selection up again...