And they could be compensated with a cut from every deal and training in the business.  

One is proforma  ( best case scenario ) and the other is actual  based on 2 years tax returns and full disclosure of the books.when you look at the different class's one will note that the C an D do not or will not perform to the expectations or Proforma estimates.. and many times not even come close.Were as A and B might actually hit proforma's.Just talk to any astute multi family investor and ask them if they get to value based on performa or ACUTALS.. and you will have you answer.What happens in the SFR rental game is there are NO Acutals your usually buying a home that has just been renovated ( because last tenant beat the crap out of it) and you have a brand new tenant so you really don't know how you will do until year 3 or longer.Some do well others fail miserably..

Below is a cut sample of a title policy.

There are plenty of guys out there who are looking for someone to fund their deals in exchnage for a cut. 

Out in the mid west its a combination its either there is far more houses than people to live in them so prices plumment... or you have inner city issues with what called White flight and the areas turn into ghetto type slums.. its those areas were cheap homes are avalaible and investors who really don't know what they don't know get sucked into buying them thinking that rents will acutally come in on a consistant basis which just is not the reality ..

The challenge with the "double close" is that back to back closings are performed almost simultaneously and that the "assignment of contract" usually involves the wholesale simply collecting an assignment fee while the wholesalers' seller and cash buyer close with the wholesaler taking a cut.  

Do a title search to see what may be on title.Have a cut off point that you will not bid above.

A BANK or lender will not fund the Loan ( acutally send money to title co. ) until they have recording numbers.

Some partners putting up the money may just agree to taking a cut of the profits or may ask for money on their money and a cut of the profits.  

The 4 plex would be apartment style and build for the purpose, not a cut up house.