At a very base level, make sure the property is up to health and safety codes for your location. 

Over the past few years, my wife and I have worked hard to improve our financial health—we’ve raised our credit scores above 800, paid off all debt except for our mortgage and student loans, and saved a fair amount.

How do most people handle this dilemma?  

If we determine that your dwelling should not be occupied because of damage or risk to property, health, or safety, we may, at our option, terminate this lease. 

ROI factors in rental income, operating expenses, real estate market health, and property appreciation to assess the potential return.

Some states require an established relationship with the health professional, not just one evaluation, but many others, it’s just a letter from a professional if disability and/or reason for animal is not readily apparent.

I priced it only about 14% higher than the long term rental which matches traveling health professionals' budget on Furnished Finder.So I'm leaning toward longer term rental because even if I secure midterm tenant, that 14% more isn't really worth the potential vacancy. 

This helps you, as the buyer, understand the health of the asset.Where in the post does it say anything about what a seller makes?

FHA has the appraiser check inspect the house for health/safety and to make sure there is good life on the roof and systems. 2.

You can always request Medical Documentation: Request documentation of her medical situation and a letter from her doctor to make sure her condition will improve and ask if she is up for taking care of the property while she is recovering.Check Her References: Contact previous landlords for references to get a sense of her reliability as a tenant.Lease Terms: You can always start with a 6 month or a 1-year lease option if you have a good idea of her overall health condition.