Is $10,101 to remove attic insulation, air seal, and install r-50 cellulose insulation a fair price?

Comprehensive attic energy efficiency upgrade including removal of old materials, air sealing, and new insulation. - Remove all existing insulation in the attic - Seal all accessible penetrations between the house and attic with caulk and spray foam (bath fans, wire, plumbing, and recessed lighting boxes) - Install foam material to the backs of all walls facing the indoor environment including knee walls - Install baffles at all accessible eaves to maintain soffit air flow - Install barriers around all hatches and equipment - Installation of gaskets at all openings and doors into attic - Increase attic insulation to at least R-50 with flame retardant, rodent repellent cellulose loose-fill insulation - Dense pack cellulose under floored areas - Seal all penetrations and leaks on outside attic walls with spray foam - Construct a 2 foot wide by 10 foot long walkway and 35 square feet of storage area