Depending on the closeness of your local community, you may have trouble raising for an individual. It's not true for all places - I live in a place that's practically Mayberry, and see donation jars up when someone's house burns down or has an accident. People tend to donate for 'causes' more often, sad but true. If you want to do a bake sale or garage sale yourself, you might be able to advertise in community papers (the kind they give out at the grocery store or bank). You might also talk to the grocery store or church about renting a table out front to hold the bake sale.
You might also go door to door to your neighbors looking for stuff they want to get rid of that you could sell for cash for him. Whatever you do (bake or garage), talk to people and explain the situation. They might donate time, money, or stuff to sell.