Dude. Do your maths. There are so many hidden cost if you want to move there with the fam.
1. How much is the housing allowance? HDB are now fetching S$3k+ in rental.
2. As a foreigner, your kids will probably end up in private school. S$1K per kid per month. If you and fam get a PR in 1.5 years, that is still 440 – $520 per kid, per month.
3. Kids too young for MRT? Then you need to buy a car.

The above are just the tip of the iceberg. If I were you, go SG first, but go alone. When you have the maths sorted out, then bring the fam.

I've been working there for 7yrs, still can't afford to bring the fam over.

CPF is capped at S$1200 max per month. Bonuses are at 20% (no cap).

E.g. 1
Salary - S$10,000, CPF = S$1,200

E.g. 2
Salary - S$10,000, CPF = S$1,200
Bonus - S$20,000, CPF = $4,000
Total CPF = S$5,200.

It sounds like you are getting an expat package. You are all set. Congratulations!

As for the CPF, you are not entitled - not yet. Only citizen and PR gets to enjoy the benefits of CPF. Apply for PR after 6 month.