Not to try and detract from the saddest part of the story, but if you are looking for an inexpensive place to move to; I have used the following links when looking for a place to live. I have nothing but the warmest wishes for what you and your father are going through; and a big kudos to you for putting your life on hold to a certain extent to be able to take care of him.
Links:
http://www.lowcostrent.org/
http://www.calgaryhomesforrent.com/index.cfm
http://www.rentfaster.ca/