There is no additional "risk" on the note like a demand clause etc, but you have  extra expense in upfront one time costs and the pre-payment penalty that most programs are sold with if rates do drop as expected in the future.  

In addition, 100 units would necessitate 100 accounts.  

Moderator, we have no financial relationship with any guru :B ] after we canceled promptly there were no additional billings either time.

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.

However, i'll likely be looking at additional ways down the road to be even more secure for a backup what if scenario.  

This is straight from the CFPB website: "Additionally, for 60 days from the date your loan servicing transfers, your new servicer cannot charge you a late fee or treat the payment as late if you sent it to your previous servicer on time or within the applicable grace period."

If you want to add it to places like affordablehousing.com then that gives you more exposure.  

@Dave Allenhello. this is going to sound reductive but if you want something immediately cash positive... i'd go with a savings account.rentals are long-term cash positive.