For long term, more than a year service. Send to bbsitter hse for daycare is $900-1k(majority charge at 900), solid food is $100-150, agency fee is $400(one off) unless special arrangements, they’re entitled 7days annual leave.
Try this website. I found one from it. https://www.babysits.sg/babysitter/singapore/
Jiang Yun Qin Christine