To move your piano out of your home, are there any obstacles that make it challenging to roll the piano out on a dolly. Obstacles might include stairs, steps, steep driveways, gaps in sidewalk, uneven surface (grass, dirt, rocks, pebbles, etc) to roll the piano out to the street, etc. (a door threshold, or 1 or 2 steps in a row is not a challenge). Tip: walk the path from your piano to the street and imagine pushing a wheel barrow loaded with 300 pounds of rock, what challenges might there be along the way? (acoustic pianos weigh an average of 600 pounds and are typically moved by 2 or 3 guys)