Although your ADU isn't exactly the same as a 1 br apartment, it's similar.So, I suggest comping against 1 br apartments, BUT be very mindful of the sq footage, grade and amenities of those apartments.

When it's set up, at that point about once a month I'll come by to collect the footage to bring home from an SD card, fast forward it say 10x speed for the month and just look for anything suspicious.

We only use green treated when the lumber contacts the concrete, But there should be a 2x4 plate between your joist and foundation.He doesn't state how many joist he's replacing, or the square footage of flooring repairs.

They know the market square footage of units because they are in those streets everyday.

Does anyone know the rules on this and when it can be added as square footage when we sell the house? 

When evaluating multi-families - you should always look at if there is unused square footage, potential to add more bedrooms or get creative.

Do you know based on square footage if the property is primarily residential or commercial? 

They cost a lot less than stick built houses for the same square footage but can bring in close to the same revenue.

Do you want cameras you can monitor or would your rather have an ironclad backup of footage you can access later in the event of some sort of incident?

I think you will find it challenging to obtain financing because even though Poway PSF is very high the appraisal associated with ADUs often are not assigning the same value to the ADU footage as the primary.