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. 

These are professionals with additional training and a stricter code of ethics.

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.

These will be LTRs and I will most definitely be playing the long game with these.In addition, as rates go down in the future (hopefully) I plan to refinance as most of us do.

The loan will be on the additional collateral you created.

I would say for most people, the 1st position heloc is no a good bet, especially if you have a 1st mortgage rate of less than 5%.Using this strategy with a 2nd position heloc can be just as powerful, so you can have your cake and eat it too!

I'm a big fan of value-add opportunities, whether it's buying something currently undervalued & fixing it up to my standards, or buying something that has additional income opportunities that have yet to be incorporated. 

We plan to remove them all to protect from tax increases on our current primary, but I am afraid that now that the other properties won't have homesteads, we may see skyrocketing tax bills and it will eat into already small cash flow from rental income.Does anyone have advice for how to handle this situation other than just increasing rent?

THEY ARE NOT LIMITED TO ONE PROPERTY.So, they can 1031 to 2 or more additional properties OR 1031 into a rental property plus a DST so that all the profits are used up in the exchange. 

These are professionals with additional training and a stricter code of ethics.