Unfortunately, the wall will remain the weak spot. I have a "hard room" off my bedroom, but it was built from the framing for that purpose. Double sheathed walls, with sheet rock on top of OSB. 3- 2x4 studs securing door frame, solid core security door, 6" screws securing frame to the studs, steel plate screwed in place under the molding to spread out the load of the dead bolt.