There are a lot of elderly people who have garages and are no longer able to drive. For years I was telling my ex mother-in-law that she should rent out the garage she never used. With her, the issue was fear of who she might connect with. I think if I had taken the time to screen potential renters of the garage for her, a mutually beneficial arrangement could have been made. In a situation like this you might not have to pay anything - just offer to keep the driveway and walks clear of snow in the winter. An extra pair of eyes on an elderly person living alone is also worth a lot. I would put out the word in your contact sphere (friends, relatives, co-workers, etc.) of what you are looking for. An ad on Craig's List or Kijji might also work.