I've stated many times I'm not suggesting a REI should have 100 loans out. 

You can hypothecate collateral from one person/entity for use by another person/entity, but you might want to borrow the money as a home equity loan (fixed payments and term...one time funding) or a home equity line of credit (HELOC).

thanks James, in analyzing regional data, Louisville continues to show a strong local economy, with a decent trend in the growing rental market, lower median home prices and values, good reasons to make it appealing to us since we are looking to expand our portfolios, providing more affordability to enter into this market ... besides, good friends live in this city ... our visit will make it a business expense :)

Like Nate mentioned, choosing the right lender will depened on the type of loan product you are needing. 

Please note the information provided below is a layman's definition designed to provide a basic understanding for the general audience.

New construction loan advice would be great also.

@Darrell Kirby, the typical sales contract in my state would provide for 2 basic possibilities if a buyer didn't perform according to the contract. 1.

I used an FHA loan with 3.5% down How did you add value to the deal?

I recommend you print, study, and highlight the HUD guide: https://www.hud.gov/sites/dfiles/PA/documents/HUDAsstAnimalN...You should also check with a local HUD office to see if they have any additional guidance they can provide you.Keep in mind, not everyone is subject to Fair Housing requirements and you may be exempt from allowing the ESA! 

Your offer to purchase should include a requirement that the Seller provide all documentation and agree to sign an estoppel certificate (also called an estoppel form or agreement).