Check out this 1016 Gambrel Shed Plan that was built in Meridian Idaho. The builder said it took about 4 days to build and paint. They modified the door size to 42 inches. There are two 4′ x 10′ lofts, one on each end of the shed with an opening in the center. They are planning on installing a spiral staircase to get up to the loft area.
The shed roofing is architectural shingles.