A mobile home driveway is part of ordinary property access and the delivery plan. Cost depends on the actual entrance, route, slope, drainage, surface, road connection, soil, culvert needs, and work required before heavy delivery equipment arrives; the county's paperwork calls the home a manufactured home.
Short answer: Document the driveway length, current surface, approach, turns, slope, drainage, soft areas, culvert or ditch, road type, and delivery route. Ask the transporter what access needs review and obtain property-specific driveway or grading scopes instead of relying on a universal per-foot number.
Reviewed by a manufactured home setup contractor and dealer.