No real "easy" solution. My prop guy (Bay Propeller, Portsmoth, VA) uses a bubble balancer (similar to the old tire balancer) to static balance the wheels. For the larger/heavier wheels, he uses a dynamic spin balancer.

For a small, aluminum prop, I don't think "balance" is as critical as equal pitch on all blades. I normally check this with the prop on the shaft and holding a stick to check that the blade tips all are equidistant as the prop is rotated. Pretty much the same process for when we were "cupping" our wheels on a trailer hitch ball.

When you start getting into the larger bronze, NIBRAL, SS wheels, then you have to be more critical of balance.