how much space the abandoned and refurbished titan II or atlas e missile silo on epstein island could have underground.

https://www.dailymail.co.uk/news/article-7898847/Cold-War-era-nuclear-missile-silo-transformed-vast-18-000sq-ft-underground-castle.html

blast doors nearly identical to those on the island. depth of an average nuclear missile silo of the time = 146 feet. height of epstein island at its highest point? 146 feet.