Live got a solid brick room in the middle of the house, then lined with 18mm marine ply for good measure, solid wood door, two 5 lever Yale locks and a 1200lb magnetic door lock. In the room is the CCTV recorder, house alarm, Internet router etc and phone line. A hefty ups supply for the CCTV and router, and battery backup on the mag lock. This way if someone broke in and killed the power I'd still be able to record and remotely login to see what was going on, plus the alarm would have notified me too. Oh and no handle on the door and reinforced edge.
In the room I keep all my tools as I don't keep them in the van.
Ive got 8 650tvl cameras with extra ir flood lights, three of which point at my van, oh and I use smart water.
Hopefully nobody will ever break in, but if they do it will or should be significantly more difficult to steal my tools or CCTV recorder.
Paranoid, well maybe a little. Oh and the mag lock doesn't have a key pad, it's got RFID entry and you need to put the fob in a certain place to release it as the reader is built into the wall. I thought having a keypad on show, someone could rip it off the wall and possibly open the lock.
Oh plus there's heavy duty hinges and 4 dead bolts in the hinge edge.