If you can get the research scholarship, living expenses should not be an issue. I believe that all admitted students are offered scholarships, so I don't think you should worry too much.
cf http://www.nus.edu.sg/admissions/graduate-studies/scholarships.php
Chua Xin Rong, studied at National University of Singapore
Source: Quora Digest
If you can get the research scholarship, living expenses should not be an issue. I believe that all admitted students are offered scholarships, so I don't think you should worry too much.