After a few additional email interactions that same day, your DoC stated "I do not have an answer for you.

In addition, 100 units would necessitate 100 accounts.  

If additional funds are required or if a professional is unable to resolve the issue, Lula will reach out to you directly.Let me know if you have any questions! 

Here is a list of what adding ADUs in my CA market is typically a poor RE investment:1) The value added by the ADU addition is often significantly less than the cost of adding the ADU.

HOA is currently $172/month, with and additional $44 for club fees, covering club amenities, including a gym, boat lift, a restaurant etc. 

Very good point.In the case of Arizona, I have been unable to locate any state law / code that suggests Arizona may have additional regulations. 

Additionally, not all transaction types support Locations, meaning you'll have to create journal entries to correct them—requiring a solid understanding of debits and credits, which can be time-consuming and error-prone.Instead, I recommend biting the bullet and upgrading to QuickBooks Online Plus for each entity.

Do they value nicer finishes and design or is that additional cost lost on the typical tenant in that pocket?

If you do not feel comfortable pursuing additional growth, I'd wait it out just a bit. 

Close to a cool little town, close to an area attraction, etc....Also do a search here and see how to screen guests, in addition to what the hosting sites do.... like no last minute bookings, no short stays....