As a single E-4 can you live off post with out telling the command team? And with no BAH?

Old guy stupid question would be, Why would you want to do this? With no BAH, how would you survive? What kind of dump would they live in? Without authorization from the command this would be a no go. He would definitely have to maintain a room in the barracks. Now wherever they decide to sleep would be up to them. Still would be required to pull any duties or any GI parties scheduled for the barracks they "reside in". Be late to one formation and see what happens. This just doesn't make sense. Too many things could go wrong for this to be feasible. BAD decision if this is already happening.

And what would happen if that single E-4 lives off post and someone needs to contact him (recall, UA, alert, etc.) and they aren't answering the phone? Something bad happens to this E-4 and no one knows about it?
If the Soldier wants to live off post, then I would HIGHLY recommend this E-4 go thru the proper channels. See where I'm going with this?

Here is another food for thought: What is the post policy for SMs being allowed to live off post? If E-4 and below require (per most standard post commander policies) approval to move off base...and the SM in question still moves off post without approval and not informing the Command Team, then they could/would be in violation of Article 92 of the UCMJ and could possibly face either an Article 15 or possible court martial.