Because I was working on the flip next door the work to complete the split went on simultaneously.

Simultaneously the most apt description and the sickest burn.

Here's what he did wrong, in my opinion.His contract with the seller did not mention a simultaneous closing or that he would be immediately reselling the property.  

This will not require any tax difficulty for the landlord and is subject to depreciation and valid deductible property expenses.This provides benefits to two segments of the population simultaneously, efficiently, and seamlessly.Housing and Urban Development is the correct office to manage this program and provide rapid relief to the people who need it the most.I can be reached for further questions at.........Thank you,J.Q.

They were called simultaneous closings or sometimes back to back closings.  

Now,  I would do two things simultaneously:  1) attend all the REIA's you can and pitch your service. 

Contrary to popular belief, VA does offer a simultaneous Purchase and Rehab loan (similar to FHA 203K), but no lenders out there do them, except Imortgage (now Loan Depot).  

The Ugly:It took about a month to come to an agreed purchase price (and how it was going to be done [seller kickbacks, vs all financing] while simultaneously doing all of the due diligence.

More than likely he has other jobs going simultaneously that are higher on the priority list than yours, which is why you've been put on the back burner temporarily.

You may also first request to expand your main dwelling, and simultaneously request to permit the addition as a JADU, then create the barrier within the home to split the units.