If you are going back to homeland to work for a while, I can understand your thinking in looking for a good school. A safe neighbourhood can be found in any city in Canada so that is not really something to worry about. You would just have to pick a city whether it is North York or Mississauga or somewhere else and then look for an apartment or a house, keeping in mind how the neighbourhood looks, how the people look and don't be afraid to ask the neighbours if it is a safe area. If there is a store or a gas station in the area, you can also ask them. Stores and gas stations are open late so they can tell you if they feel safe walking home after their shift. If you visit the local school of that neighbourhood, you can also ask them what their neighbourhood is like.
The only problem with your plan of looking for good school over job-rich area is that once you come in Sept. the school year will have started again after the summer. Your daughter will be a full blown teenager and will have settled in and have friends already so if you want to move at that time, there will be some tears and tantrums for sure. However, you are the parents and she will survive for sure. Whatever you decide, good luck to you