Due to my grandparents health, they have reduced the size of the company and business to a point that cash flow is a problem for traditional loans both business or personal. 

Cite=59.18.060(13) Provide tenants with information provided or approved by the department of health about the health hazards associated with exposure to indoor mold.

What other ways could this be formal/official and put him in position to take back the house if the deal went sideways?  

We are looking to move to a warmer location for health reasons / future family planning, change of scenery etc.

Cleveland is home to Global Center for Health and Innovation, which is very large in the health care perspective.

You'll want to know if the land is in a flood plain.Since it's septic, you'll need to ask whoever has juridiciton for that, probably the City or County Health Dept, what is req'd for soil testing and how many square feet is needed for the field bed portion of the system.

I am sure he has some sort of mental health issue, maybe schizophrenia or he is disillusional.

Columbus already has the headquarters of national brands like Nationwide, Cardinal Health, Big Lots, L Brands, CoverMyMeds, Wendy's, just to name a few.

My parents are on a fixed income with no long term health care coverage.

I have requested the official lease. currently the asking price is around 8%, i m trying to buy at 9.5-10%.