in simple terms the price is more or less justified if you sold each unit individually  but if you evaluate it as a multifamily property its 50-55% less than the current suggested price .... number example 4 mil asking price valuation (Residential calculation) vs  2 mil valuation (Based on NOI Multi-Family calculation) The property in question is a "text book" built and zoned as multi-family property no doubt... 

Propstream allows you to pull niche lists of homeowners that are tax delinquent, failed listings, high equity, or even in preforeclosure.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

I joined a commercial rather than a residential firm, but your license allows you to do both.

The Conventional ones, Freddie Max Choice and Fannie Mae HomeStyle will allow a 2 unit owner occupied property to be done with a 15% down payment based on purchase price + rehab dollars.

The property is zoned as mixed-use tourist commercial, which allows me to convert the property into a motel/hotel.

This would allow you to put 3% down on FHA loan and rent out the others to offset, hopefully cover, your mortgage payment + taxes + insurance. 

I had to generate 100's of leads in order to eventually find a good property that will work.Figure out a process/system that will allow you to generate leads like a machine.

Alright. I have thrown multiple offers at a seller that only wants to sell his properties via seller finance. I have thrown about 4 offers out his way and at this point it almost feels like I am negotiating against my...

If you ask any HNW individual they are never about multiplying returns - they are concerned with preservation of capital first and foremost.