Are you married to renting? If you're staying in Edmonton for a few years, it might be worth buying.
I did a quick MLS search, and there are approximately 180 detached houses in Edmonton for under 250,000, and a 250k mortgage at 3.99 fixed is approx. $1060/month, leaving a bit of a buffer for tax/insurance to keep you around 1200/month.
You could also buy something for quite a bit less. For example
http://www.realtor.ca/propertyDetail...dKey=-68174469
this (small) house is only 159,000. Its basically a 2 bedroom apartment on a piece of land in the NE.