Dee: The charge depends upon the area to be covered, and lineal feet of crown mold. You can use our cost calculator here for drywall: https://porch.com/project-cost/cost-to-install-ceiling-drywall and here for crown mold: https://porch.com/project-cost/cost-to-install-crown-molding. As far as time most likely two to three days. Thank you.