Let's count again in reasonable detail:
Salary
$200,000
Net pay
* $117,025 ($9,752/month)
However you will get about $300/month more from spousal income tax amount. You will also receive some monthly child benefit.
So
the true family net income would be about $10,200/month
Costs (monthly)
Mortgage: 2000
Property tax: 500
Property and car Insurances: 200
Gas (for cars): 200-300
Kids: 2000
Utilities: 500
Groceries and other foods: 500
Various shoppings: 500
Beauty, aid and health: 300-500
Clothing: 300-500
House supply and maintenance: 500
Save for vacation: 500-1000
Restaurant, entertainment, fun: 500
RESP: $300-400
Total: $8,800-$9,900
There would be only $300 to $1,400 left for each month. No way to save for below:
RRSP max out (actually quite important if working for private business without pension): $2,000 per month