If the primary goal, and it should be, of every investor is a return of capital and the secondary goal is maximum return on that capital, then you are in a great position.The real problem you need to solve, as I see it, is taking advantage of the unused equity in your Atlanta property.

If you don't want to miss out maybe just buy it as your primary and live in it until you can actually at least break even.

I recently bought a primary residence all cash and would like to put a HELOC on the property to use as a revolving line of credit for various real estate projects I am working on.

A Heloc on my primary residence was where I started, and I was able to use all my own money. 

Buying your primary home first allows for stability before investments, but may require higher down payments and stricter approval criteria.

In addition, the capital outlay starts long before any income and the detracting of something from the primary structure even if it is just yard space.As indicated, my original protege made a lot of money (over $500k) on a land transaction associated with a large count ADU development.  

Specific Questions.With a long term one year lease term, with month to month terms after, how difficult is the process to "force" the Tennent out if needed to move into the property as our primary residence.  

A lot of forever houses on the primary side and buy to hold forever are far from forever. 

See if you can get a copy of The Millionnaire Real Estate Investor by Keller.The Slight Edge and Atomic Habits too.

From the tenant's pov, I don't see why a conventional lender would have issues with a tenant buying the property as a primary that they've been living in.Cheers!