Flat origination charges (processing fee, underwriting fee, etc) are generally workable in scenarios like yours if I'm now reading it right (concurrent closings on multiple properties at the exact same time?) 

(e.g. concurrent certified & first class mailings)  This is especially important if you are going to evict this tenant for violation of lease.  

Our base price is $75/mo per concurrent user.

A property was bought by my grandfather and two relatives as a tenancy in common concurrent ownership.

And for many real estate investors, different calculations are applicable to different rental properties, so often there are multiple algorithms in play concurrently. 

A major caveat is that I have learned that I don't have enough hours in the day to run concurrent $30k renovations for investors so I am very sensitive to ensuring we are targeting quality properties for basic renovation, not targeting fire-damaged properties for massive rehab.The natural conclusion of the buyer-agent rehab and rent concept is offering completed and performing rentals at a similar price range as the all-in rehabs so I do offer my regular group of investors a few Turn-Keys...properties that have been in my portfolio for a few years, typically rented Section 8 (which I feel are very stable investments), with my company continuing to manage so the tenants never feel a change in authority.

If landlords in SE Michigan and other regions were to join this effort or initiate concurrent efforts we should be able to raise significant funds and have a greater impact.

Best you are realistically likely to get from any fannie/freddie lender is...Rates in the mid to high 4s, 30 year fixed.8 concurrent closings on 8 residential 30 year fixed loans. 8 purchase contracts.8 simultaneous escrows.8 individual appraisals. 

If you only have enough money for 1-2 concurrent deals...

Short Sale Monitoring Solution provides real-time access to lenders’ concurrent transactions on short-sale properties through the CoreLogic Mortgage Fraud Consortium, the largest repository of application and transaction data, representing 65 percent of annual loan applications""Short-sale fraud is costing lenders $310 million a year and those losses may increase if lenders cannot proactively identify risks in real time,†stated Tim Grace, senior vice president of Fraud Analytics, CoreLogic..