I need to determine how much someone else purchased a note for and what kind of margin they are looking for to flip it.There's a property I'm pursuing that is a little out of the ordinary - so I can't quite wrap my head around a few things.

I definitely understand where you're coming from, although I should note that this was actually not in the kind of neighborhood you would expect this kind of thing to happen.

Kind of like how MSRP is meaningless for many consumer goods.

I've been trying to help him figure out his next move but I don't think I've been very helpful as my knowledge of these kinds of transactions is slim.

These were usually pretty boring, rote kind of calls. 

That's your maximum value for money.This is the perfect sort of place to do this kind of small-scale rehab with.

What kind of written guarantees will the charity offer you?

Depends what kind of cash flow you are looking for and consider good.

I am getting pulled in all kinds of directions with really knowing if I can purchase a 4 unit as my primary residence with a FHA loan and be able to use the rental income as part of my DTI?

Kind of like an insurance company, they use the pool of money from their customers to pay out in the case one of them runs into issues.