Thanks for all the great input everybody!
As it turns out, for 2017 3 ACs and the 10Kw aren't available. For '16 they are shown as options on the Dutch Star on Newmar's site, but it is not a standard-order option on '17s. I'm sure they could add it "custom" for a price, but I have a lot of faith in Newmar. If 2 15k units couldn't get the job done, they wouldn't option their coach that way. Again, I was a little bummed out and concerned when I got the news, but I don't think Newmar would build a coach without an option for hot climates (keep in mind, 2 x 13.5k are standard, the 2 x 15k is an option).
This means the 8Kw it is, sorry to have wasted everybody's time!