Dear Alisand
There have been many other "is my package enough" type threads on this board, but I will give my opinion on your package in brief.
Firstly, you'll pay around $15k tax on your salary, leaving around $100k net or around $8k per month.
You'll probably need to budget around $4k at least for a 3-bed condo + utilities in a nice area.
If you send both kids to a private school that would be around $1.2-1.5k per month each (the younger one will be cheaper than the eldest). Then I think you'll need to budget at least $2k per month for groceries etc
So you see we're already at over $8k with nothing put aside for transport, holidays, savings, entertainment etc.
In other words, I don't think your package is near enough to give you the lifestyle you want.If you really want to come here and can't negotiate up, you'll need to get your wife working, or look at significant economies in your lifestyle (eg local schools).
Secondly the relocation allowance doesn't look generous. Private schools look for deposits of around $5k per child, you've got airfares, removals etc to pay for as well. I'd ask \for at least $20k if I were you.