In my opinion, you should move to Edmonton for sure from the long run perspective. One of the biggest benefit in my mind would be the better education of your children. The other one is you might have more potential in your career development because you will be possibly working in headquarters of big companies. This opportunity might be once in a life time. You don't want to regret later.
Good luck!!!!
可能你以为Estevan在大温地区,需要补习加拿大地理了。Estevan薪资水平不低,就是地方小,人少点,在那里惯了,去Edmonton和你们大温可能会觉得闹的慌。