Anywhere in the country. I have a key that opens the door to the school as well as my classroom, the media center, faculty room, and more. I'm often in the classroom or squeezed into one of the display cases at one in the morning.
Total access makes more financial sense, imo.
The district is getting more of your talent and effort by supplying you with a key to the school. Leslie, approach it from a financial perspective and perhaps their ears will perk up even more.