For instance my lender will do a loan for BRRRR type projects for 50/50 owners, 30yr AM, and very competitive rates, with zero seasoning. if you leave it in one individuals name, both title and debt, it'll be much harder for you to claim a vested interest.

For instance, I had a family friend that gifted their home then had a sudden illness that required long term nursing home care.

This chart has monthly prices...if it was year over year prices, it actually is even more prominently shows an upward curve, as we have only seen 2 instances of nominal price drops. 1991, and the great recession. 

In the DC area for instance, most investors know of the major wholesalers - Express Home Buyers and Market Pro Homes.

Not deal breakers.I'm currently an active retail mortgage originator, amongst a couple other things, but Its been my experience that working as a wholesale account executive from 2000 until 2016 and being on the backside of literally thousands of loan closings since the inception of the newest regulations that I can recall only one instance of a set back caused by cents on a transaction, but that was early on in the Dodd/Frank era and was the result of software, that was subsequently fixed by an addition 3 day waiting period, because that was the safest play for the lenders ***.The take away here, again just in my opinion, is on the front side of the transaction, write the offer at whatever it takes to get the contract done, then hand it off to your favorite lender...they'll figure it out. :)

Also will the tenant have same rights within the original lease or could they just go into evictions if they also don't leave after the 20 days for instance?

I understand not having full control in either instance as you don't own the whole building, just wondering if you see a difference. 

For instance, what if I identify a property for the exchange, but then, after performing due diligence, decide against purchasing the property due to a defect that is uncovered during the inspection?

It has been difficult for her to support us and pay for most of our daughter's college at a famous college without going into any long term debt. 

For instance, my company builds age-restricted apartments for seniors.