Ken Zwick and Carol Hollar-Zwick knew their home came equipped with an underground fallout shelter when they bought it 1999, but they didn't actually venture into the bunker until a decade later, the local Appleton Post-Crescent newspaper reported.
they were living in the place for ten years and finally got around to opening the large metal doors on their property? What does it take, ten minutes? What have they been doing.
Sounds like a very reasonable cost.