There may be a way to reduce property tax reassessment by using LLCs, but it is a complicated plan, takes time to complete, generally needs a business purpose, and is not without risk. 

If it’s 4 units you’d always want the residential loan with the 30 year fixed rate, especially if you plan to live there.

You’re definitely on the right track by planning to open separate bank accounts for each property and the holding company.

Assuming you don't plan on going back into any consumer debt again I like your plan versus barely getting by.

Have a solid rehab plan and execution strategy.Expect the Unexpected – Always have a contingency fund (10-15% of your budget) for those surprise repairs.Flipping can be a game-changer if done right.

Then plan a date to actively start looking to buy.

I plan to use it as a rental property, but I'm concerned about the location—Bullhead City, Arizona.

My plan is to maintain the status quo and benefit from annual rent increases and equity gain as the tenants' rent covers the mortgage.

i tell them all the time to find a good W2 job you like and you plan on staying with a long time. 

I currently live in it as my primary residence but had plans to eventually rent it out and then cash out refi once I reach 20% equity in the property.