How much does it cost to level earth soil for 250 m² area (entire backyard). The angle of the slope is about 1 to 3 degrees. Also what kind of vehicle is needed? how wide of an access is needed? (because access from the side of the house is not enough to fit a small car through. Also there is an existing shed on a cement slab in the backyard. Also who should I contact to do this type of work?