I was slightly familiar with this Missouri high school, but there were two very important things I was not aware of. First, I did not know that the tuition made it the most costly high school in the state of Missouri and I did not know that it has apparently closed in disgrace.
If you do a search for places you can stay that are "secret", "peaceful" or "off-the-beaten path", there is one treehouse that gets mentioned in Missouri. It's one that you can really stay at, too.