If I even allow a little over kill, the maximum would be say, 12, which would include the parking lot, areas immediately preceding entrances, etc.
If however, there weren't other reasons to want Pro+, if I acclimate to the system nicely, and notice a real difference (without a shocking number of additional hardware I need to either replace or augment for some of the things that [are] working with a Dahua NVR - (and I do intend to replace my Dahua with the Milestone VMS, and use this computer's hardware to record and playback the most recent week's data with M.2 drives of the Evo 960 fashion, and then archive them in some way which I'm still evaluating and will list below) - I could force myself to get by on 8.
Aside from getting a general view of the parking lot and walk in's who don't have customer oriented questions to cross reference agains a burglary, god forbid! (this atheist says).
1. Stranger/Danger people.
2. Catch any theft (real time or afterwards.
3. Deter shrinkage.
4. Find stuff that I or my employee's misplace!
5. Watch data recovery.
6. Make sure employees work a reasonable percent of their day.
7. Audit client conversations in real time to catch them manipulating my employees! (I intend to put a speaker in there so that the voice of god can interject the BS status of their claim.)
8. But possibly my absolute, FAVORITE reason; the reality show method of fighting any yelp-tards.
If someone gives earnest criticism, even if they believe it but it's untrue, and they aren't just malicious asshats - I either thank them or say nothing. However, when their review is pure fiction, my intent is to provide those who search this person's name on the internet the means to see their behavior - hear the discussion, the agreement, what we did vs. what they said.
The notion of businesses having a means of providing some accountability for claims... without getting charged with long-windedness (as I write a thesis) ... the fact is, reality just takes a while to write! This is why legal stuff is long.
Anyway, IF this works, I will eventually create a system for people to see the converse of yelp, a video record of the client's behavior and their interpretation of the event vs. the real event -- so the court of public opinions is predicated off reality.
Yes, I have signage, my attorney has checked it out, its LARGE, and the rules are simple; don't lie as you engage in malice, and you'll never be featured. :)