A number of the ideas have talked about using Wards or the like, and run into questions (like a Ward of Detect Invisible and the concentration issue.) When RCI first presented Wards, I had similar issues. I ended up deciding that any informational spell that conveyed knowledge to a caster's mind, or any spell that required concentration, could not be placed in a Ward. The Ward has a presence, and maybe you can argue it goes to that presence, but so what? Maybe, if you wanted to, you could argue that if the caster is within range of the spell, the scrap of the caster's presence left in the Ward connects back to their full presence, and they learn the info. But what if they're mid-spell at the time, do they get interrupted?
The presence aspect of Wards also makes them relatively easy to spot, since the Presence spell is free and low level for some professions. One 3rd level mentalist can detect any Wards for free.
I didn't see any mention in the list of what counter-measures an expected intruder might have available. That would make a big difference in what measures are worthless, or worthwhile. Nor was there any discussion of using scrying like Past Visions to track intruders/criminals. Mentalism Companion had a wealth of information on scrying and counter-scrying measures, might be worth a look.