To do Airbnb, you would have to furnish to the nines and add tons of amenities so it is group accessible.

I know there are things I need to do to analyze if the deal is a good one, like rental rates, Status of the house/infrastructure, amenities in the area but what else should I be thinking of? 

See what amenities they have, how much they are booked, and what they charge.. then set your rates by these metrics not by what some algorithm is guessing at.

I had moved some photos around and those amenities got stuck.  

This is because the main house often includes value drivers that ADUs do not, such as larger living spaces and more comprehensive amenities.

Hey Chris, a few thoughts here.Considering that office is not attached to the house, I wouldn’t add any footage to the total home square footage; however, you could advertise that office space and amount of footage and amenities in your remarks.If you’re a Realtor or are using one for the sale, your local MLS may have fields dedicated to additional footage for other buildings on the property, such as ADU’s.The other point is that typically, perhaps depending upon location, a space needs to have heating to count in the square footage, which this office doesn’t have if I understand correctly.Consider contacting an appraiser to inquire about how they would handle this space on an appraisal, or a Realtor.

The state has always had many hurricanes and while insurance here is higher than the national average, our housing price to amenities ratio is one of the highest around. 

Is this an amenity worth spending $$ on?

Your photos must look amazing, just focus on the amenities and rooms that look the best.

You probably don't need to change your interior design or furniture, and you already have the pots/pans/dishes and amenities needed to drop in a student or a traveling tradesman.