Over this time I have acquired my contractor team and have vetted them through my job as a property manager, figured out my strategy(Off Market/Deep buying) and location.

Stable job for 20+ years.

In some instances the estimate may be less important but rarely if ever do I not see a requirement for no appraisal unless the value is 4x the loan amount.

I understand this is not a requirement, but I have never received a damaged unit from an inherited tenant or any legal issues.

I can vouch for @Lane Berry he manages I think at least one our units in Houston, excellent job 

If they are pre forecloure/foreclosure, probate, or lists that require fast access to the lead to gain an advantage how new is the list and are the leads already on the prominant platforms like Propstream and Propwire?

Am I giving myself another job/business?

The growing tech sector, infrastructure projects, and diverse job opportunities continue to drive population growth, making Atlanta a promising option for multi-family investments.

This will affect things like required down payment, rates, and even which lending institutions would be willing to finance. i encourage you to look up warrantability for financing just so that you don't have surprisses when your 20% down buyer cannot finance that way.

As for non-bank loans, I'm familiar with a loan program that provides 100% financing, but it requires a minimum 650 credit score and proof of funds covering 12 months of interest.