I recently purchased an investment property in Morris County NJ, but the attic insulation needs to be redone. I have a few contractors come out to give me estimates. but the estimates are all over the place. I am putting Applegate cellulose R-38.( around 12inches). The attic size is around 500 sq.ft. Approximately how much should I pay for the insulation, sanitize and remove existing insulation, air-sealing per sq. ft.?. The property is located in Morris County, NJ.