We try to tackle a floor at a time (top first) an work our way down ... much tougher to do in a 4-unit.

We would like to benefit from the rental right away and tackle the rehab soon after.

It is a simple scenario from the sounds of it and any legit CPA should be able to tackle that pretty simply. 

I know it’s a tall task for my first BRRRR but I’m willing to take tackle it on. 

Foundations issues may not be something you would want to tackle on your first rehab experience.  

I have partnered with a middle eastern private equity firm who has given me the okay to tackle this large development.

My company has renovated many other units in the complex and is ready to tackle the work, and in the past we've always been able to put 20-25% down and $3-$4k into updates.  

I won't knowingly tackle a meth house again without lots of profit in the deal using conservative numbers. 

To get people out and raise rents, owners and investors in Metropolis are having to pay "severance packages" for tenant of 5 - $10,000 / $20,000 / $25,000 sometimes more depending on surface and other factors.Your solution is to build model to sell these unit to the tenants (on a massive scale).The model you come up with to tackle these 550 low yielding units you portfolio is the following: Instead of using bribes to kick people out you decide to "subsidizing tenants'" into 1st time ownership. i.e. you want to help them to buy there own flat (at least the tenants who are decent earners).Instead of using money to get tenants out, the model would be to help them get financing by sponsoring a portion of the deposit on the Mortgage.

Many many topics have already been tackled on here.