What if you cannot get a $50 rental flat which is clearly in limited supply. The market rate rental for a 2+1 flat in Bedok is $2.1k. So if we replace that,
Living Expense in SG
Meals - $4 * 3 * 30 = $360
Transport - $200
Utilities - $100
Total = $710
Monthly rental: $2100
Family of 3 = $2100 + $710 + $710 + $710 = $4230
2 working adults = $2100 + 710 + 710 = $3520