To give a little backstory, I am 22 years old, I work as an account executive in a sales start-up and have consistently done well but I am frustrated by the lack of upward mobility and feel like I have hit a dead-end selling a product that doesn't excite me. 

Do you mean negotiating terms, making sure all contract docs are executed properly, not missing any deadlines, liaising with title, lending, inspectors, etc?

I have another 1031 Exchange coming in the next few months where I will see to execute again on the same strategy I land on...  

The Tenant has the right to pay the redemption amount to the landlord and or landlord's agent in cash, certified check or money order at any time before the actual execution of the eviction order.

It sounds like you educated yourself, prepared your estimate of repairs and executed well.

I'm looking for a few good ones to execute BRRRs

Know that tax liens are state specific (each state has their own laws) and even county specific about how the laws are executed.

See how they are for the first 1-2 months and execute your plan from there. 

Without getting into ways to finance the deal (though I would love to), how do I execute a WHolesale offer to the estate owner AND find a flipper to buy the contract from me? 

Additionally, you will have the executed month to month leases.Most local Realtor associations have standard residential leases for their members use.