While receiving the baby bonus cash gift within 18months of my baby. Will I or can I receive the payout like 2-4 weeks earlier than the actual payout date of each payment?

Try contacting them but it may be difficult as government systems are set and may be difficult to adjust

https://www.babybonus.msf.gov.sg/parent/web/con...

Go for other ways, such as a short term loan from friends or family, explaining that you are receiving a baby bonus soon and will return them.

Also, if the problem is longer term and can be a serious issue taking care of your family, do seek social assistance.
https://www.msf.gov.sg/assistance/pages/default...

On the left sidebar are tons of different schemes that can be useful.

Don't worry, all parents face some difficulties now and then in life, seeking help early is best for the family! =)

Write in or call in to check with them, you never know until you try!

On another note, consider generating other forms of income through other sources as well if possible, all the best.