I have had to get a trash out done on foreclosed property in the past. I have had local contractors/vendors charge so much per cubic foot. I have also received estimates from a vendor based upon how many man hours he anticipated it would take to load up all of the junk and he added what he estimated the dump fee would be at the local landfill. Based upon where you live local vendors could establish their price this way or perhaps other ways. You may want to check with some of the local Realtors who commonly work with REO property and see what their experiences have been. Generally the companies handling the REO properties have a dollar amount they can approve without a supervisors approval and in some cases without a detailed written estimate from tow different contractors or vendors.