With moving walls hidden passages and compuers security systems ext.
Just go buy an old army missile silo that there no longer using and are selling, get the underground missile silo because it offers better protection from bombing and shelling and has a fair amount of fallout protection, then hire some contractors to put in state of the art surveillance and security measures, there is enough room in an old missile silo to build an apartment complex but you could use it as a luxury safe house for you and your friends.
What does this have to do with Astronomy?
