Syrup by the Sea, there are lots of other species of trees that produce sap which can be tapped and made into syrup. That might be an option til your maples grow to tappable size. Box elders, aka Manitoba maples, grow everywhere and are often multitrunkers. Birch trees too. I know there's a whole bunch more, like both black and white walnuts, but try Google and see what trees in your area are profuse and can be tapped.