That should be more than enough to buy a decent house in Toronto.
However, if you only have 90K CA$ before tax and you have not bought a house, and more importantly, if you want to buy a house in Richmond Hills or some other hot areas, you will be in difficult.
As you mentioned, it's hard to accumulate $90K-$100K for down-payment with this before tax income. Because you did not earn $90K from the first year. However, it is still enough to afford a quite good house. I think the major reason that you don't want to buy a house now is that you missed the chance to buy when it's still cheap. Now you become hesitated to buy at high point.
However, if you only have 90K CA$ before tax and you have not bought a house, and more importantly, if you want to buy a house in Richmond Hills or some other hot areas, you will be in difficult.
As you mentioned, it's hard to accumulate $90K-$100K for down-payment with this before tax income. Because you did not earn $90K from the first year. However, it is still enough to afford a quite good house. I think the major reason that you don't want to buy a house now is that you missed the chance to buy when it's still cheap. Now you become hesitated to buy at high point.