Linda, To get an idea about fishing through walls, look at the framing of your garage. Assuming it is without drywall, this gives a good model of what you need to consider--you need to start between 2 wall studs. Then you'll see 2 2x4's at the top of the studs. These need to be notched out to run the wire through, (that's after you cut out a 3x5 or so piece of drywall to see the wire reach the ceiling. Then you need to locate the above floor joists and fish wire between them to your fan box hole in the middle of the ceiling. Be sure to use a fan brace bar kit, and not just an elec box for fan fastening. Good luck, post back or better yet e-mail (are you and your son by chance in NJ?) if you need more help. This can be challenging and lengthy to explain in writing.