Since the house "Needs Major Repair," I am not able to get traditional bank financing and thus would need to borrow from a private lender to show proof of funds.

Hi All,I was hoping I could find out what the current rules are on this from any mortgage lenders or brokers: If I buy a house with lended private money when can I refinance into a lower interest loan and cash out the private money folks?

My company is a buyer and private lender of lower $ ARV SFR properties throughout the U.S.Wishing you continued success.

Moreover, when private or specialty lenders do for example business-purpose loans on non-owner occupied property certain disclosures and documents aren't required.

Why not just save all of the cash flow, add your personal savings to it and use this to save enough for a downpayment on a multifamily property?

Specific wording in a contract isn't necessarily going to save you either. 

Agreed with @Ben McMahon .... impressive that you have 11k saved up first of all at that age.

I traded some private coaching for his son in order to be able to purchase any multifamily unit of his that he has procured in a recent buyout from another aging investor.

You might look up Upen Patel from The Federal Savings Bank here on biggerpockets. 

He'll probably need some local banks or credit unions on this one or be able to BRRRR it using his own cash or private money.