Kodiad, my brother had a 16ftx20ft shed built. Came prefab took 2 guys 3hr to put up 2 yrs ago. He framed in windows, sealed the floor, insulated and panneled the walls, took off the barn style doors framed in a regular door, put in a small wood stove, cupboards, refrig, bunk style beds. He's not done yet, but you would believe the difference from when he started. This was done on our place up on Mud Bay Cape Vincent NY. Something to think over when you build.
