There is no one magic pill (otherwise everyone would be doing it). 

We have found a great neighborhood that has many nice homes to support values, and foreclosures that can be purchased for a very reasonable price (though the taxes are always very high)  We currently rent to a young professional that works in the medical field.  

I require no ongoing delinquencies other than medical debt.  

I recently evicted a veteran (and my background is 30 years working in a VA Medical Center with veterans and having a father, former father-in-law, current partners father and youngest son who were/are all veterans) who was 100 percent service connected and had income at least 7-8 times my rent.  

I have student loans, medical bills form a bad accident, and some dumb stuff from when I was younger.  

A great start is by reading Brandon Turner's book on Investing With Low or No Money Down.The lady who sold us our first property wanted an income stream and not a lump sum so she could continue to receive her medical benefits.

I believe it is illegal to turn away or deny people with "Service Animals" or "Companion Pets" for medical reasons.  

If you have a local VA Medical Center near where you live contact them regarding whether they participate in the "HUD VASH program".  

5.8 cap is OVERPRICED for medical tenants NNN.

With people living longer, we have to consider medical costs, life insurance, long term care, taxes, etc.