You only need to hire armed guards for a few months until the problem of the repeat career criminals breaking into the place is solved. They will run out of criminal burglars before you run out of armed guard salary.
Sure, because criminals are all dumb as rock and flock to your guarded property like lemings.
What they certainly won’t do is threaten the family of your armed guards, or bribe your guards, or sabotage the vehicles of your armed guards until they don’t show up no more, or learn the schedule of your armed guards and sneak around them.
Or you know, lay low and do easier things until you stop paying guards and come back then.