If you bought sentry bots from Jyles, they will probably bring more irritation when bumping at you and breaking your path finding than actual protection, and for this reason some players avoid purchasing them or even destroy them on their own.
The bots probably could just stand somewhere in the hallway (maybe on a charging pad), and start moving only when alerted by cameras/noise (like Elwood's house, Lost Vault, faceless or research facility sentries), or when you leave the house or observe them from stealth or through surveillance monitor.
