Not only can fruit trees save money by providing shade for your home to reduce heating bills, but they're also a great source of free fruit if properly maintained.
For instance, one healthy semi-dwarf apple tree can yield 4 bushels, or about 168 pounds, of apples per year, according to the Master Gardener Manual for the Cooperative Extension of the College of Agriculture at the University of Arizona. If apples are selling for $2 per pound at your local grocery store, that tree drops $336 worth of apples each year. And that's not even taking into account reduced doctor bills (get it?).