So of course I keep looking for ways to get in contact with cash, buyers and I end up finding out that the local auction is happening literally the next morning.

At some point, either after a 3-5 year single tenant stay or after x number of tenants, you do have to spend a decent amount of funds to keep a property looking "fresh" enough to get +95% of market rent..

Is there a resource whereby I can run a search for, say, the last 6 months or 12 months for all properties that were purchased "off market", not listed by an agent.  In my area they are generally labeled, "NON MLS" on...

Then with the remaining cash, we have a partner who would go in on a multi-family with us.

Did you have your own cash available that you used?

Since I have over 10 airbnb units in the metro atlanta area I have a systems and employees in place that automate the demands of running an efficient airbnb for business cash flow purpses. 

That means the -ve cash flow will be my housing costs. 

You need to vet them for what they are bringing to the table (cash/project management experience/contractors/etc.)A good hard money company that can work with investors on the loan and/or construction costs.

Not to mention the ARV would get a little bump if you were interested in cash out refi on the property along with a rent raise. 

Then, you should be working multiple jobs to save up cash.