We want to buy a motorized top dresser spreader after 5 years of using wheelbarrows. For each average lawn 50 x 120 ft with average house (approx. 3500 sqft of lawn) we use about 1 cubic yard of triple mix top soil when spread with a wheel barrow/shovel. Our customers seem satisfied with the results. Our concern is if we buy a motorized top dresser spreader that it spread more evenly and we will be using 2-3 cubic yards instead of 1 cubic yard we are currently using on the lawn. If this is the case we will have to double triple our pricing. We have never used a motorized top dresser. Do you think we can still get away with using 1 cubic yard of top soil for the above size lawns?