My In-laws just bought a piece of property with a metal bldg. for storage. The incoming service is at a pole about 50 feet from the street with the bldg. another 50 ft. from the pole. The pole currently has a 40 amp box with a couple of GFCI receptacles in it. My father- in-law wants to put in a 200amp main breaker box on the pole with a NEMA 3R panel mounted on the outside of his bldg. If we do this he would lose the receptacles at the pole and we would need more/ longer extension cords to get power back toward the street. I wanted to see about re-installing the old 40 amp box next to the new 200 amp main breaker box but since there are only one set of lugs on the secondary side of the main, how would I accomplish this beside running a circuit from the new panel at the bldg? Your thoughts please!