Expenses include corporate/admin overhead and direct expenses associated with each client. 

I say that with a degree of pride.  ;-)

However you can look at a few modular website associations.

I would include that as well as vacancy, repairs, and other costs associated with the rental.

If the separate leases stated that each individual was personally responsible for 1/4 of the total, then I would agree entirely with your assessment.This information comes directly from the Rental Housing Association of Washington State (RHA WA) and directly from their attorney's whom I just got off the phone with.Either way, I appreciate the help and advice! 

The problem with this is that I don't know if those were sold at at foreclosure auction or in some shady way between associates, or if it was  just structured that way for business purposes. 

I graduated May 2018 with a degree in Civil engineering and I am currently working with a utilities consultant in the north shore of Massachusetts.

Join a Landlord Association!

Debt gets paid an interest rate.So, I would first suggest looking at those to determine who did/does what, and the value associated with those. 

What you don't have to pay is approximately $1000 per year to be a member of the Associations and or the MLS.