Erin Liam/ Business Insider
- Iszahar Tambunan, 45, left his job in shipbroking to take over his family business in Singapore.
- The restaurant, Sabar Menanti, has been selling nasi padang since the 1920s.
- Tambunan says it's difficult to juggle rising costs and rent while maintaining the quality of food.
As the lunchtime rush

