UDFI is a subset of Unrelated Business Income Tax (UBIT), that applies when a tax exempt entity (such as a retirement plan) engages in a trade or business on a regular or repeated basis.  

There are many ways to acquire financing or funds/ capital etc. you need: hard money lenders, traditional banks ( investors pay more in interest than owner occupant status home buyers), partners, family and friends, retirement funds ( maybe Roth), private lenders, mortgage brokers, crowd funding, seller financing, savings, rents/ dividends/ interest and other income, etc.

The rush was because the seller is very elderly, and she was taken to the hospital today and needs to sell the home so she can go to a retirement home. 

@Stephen Akindona The company in question is Rent To Retirement .comI'll check out your company also. 

It was much much quicker and easier to acquire the volume that I needed to retire myself from the 9 to 5 doing the Multis.

Wells Fargo would be the first one I would talk to and not the local branch but rather Tony Petosa in Carlsbad, CA now that Creighton Weber has retired.

Here's the quandary:My father will be retiring and will come into a end of contract bonus, they don't really have any other investments and he's talked many times about wanting to invest in a home with me... 

So my previous goal of retiring from my corp job at an early retirement age changed to starting my own successful real estate investing company.

We are older (the Mr is about 5 years from retirement) and I'm not up for a whole new career.

Like you said, people want the financial freedom to travel and retire, but the freedom that REI is giving you is priceless.