I got a nice bullet stop and sound barrier when the new Kohls was built. They had to cut down a hill for the Kohls and the parking lot. I got all the dirt I will ever need for free during the construction.
If you have acreage and need fill dirt as soon as the signs are put up for any building projects stop and ask about fill dirt. It won't take long to find a contractor who needs to move a bunch of dirt. You have to have a plan to use all the dirt. You also need to have enough money set back to rent a bulldozer for a month. They will level the dirt as it is dumped but you are going to have erosion to control after the contractor is gone.