This is a high quality lock that will not be picked, either by a thief or a locksmith. Don't lose your keys!
It is expensive but far less than the thousands you mentioned. Of course without armor to prevent kicking down the door, the best lock in the world won't help you, so installing some armor would be a good thing to do.
https://securitysnobs.com/Abloy-Protec2-Single-Cylinder-w-Lockable-Thumbturn-Deadbolt.html
This is amazing.