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.

I'm unsure if you would be able to combine both loans given that the HELOC is tied to a different property than the one you got traditional financing on.A work around is if you are able to purchase the new property with the HELOC at a significant enough discount, bring the property value up via renovations or additions, then refinance the property, pulling out enough money to repay the HELOC. 

In addition to other tax strategies like a cost segregation study on the fully rented out house.

House hack until you have kids.

There will likely be a partnership return required where you flipped a house with a partner and lost $120,000.If you sold the other property within the same partnership, it will also be reported on that partnership return.The net result to you is that you will receive a K-1 showing your income / loss which you then use to report on your individual return.If you made no money within the same year, you likely pay no additional taxes / get no additional refund.Best of luck.

Outdoor storage, moving services, additional parking.

Pay attention to the duration.DM me if you want additional thoughts.Jeff

I'm an agent in addition to being an investor.  

In addition your 17 so I am assuming your still at home.