Getting mulch from the dump presents many problems. For one, they make that mulch out of ANYTHING that comes in there, meaning for all you know there are pieces of old rubber tires to brush from spring cleanups. Second, and probably the biggest issue is this mulch is not treated AT ALL. You will basically be opening your customers home to termites and other unwanted pests. My advice, take the hit on this job or not make as much profit, buy the mulch from a reputable mulch dealer and have a happy customer.