I asked for small down payments and provided relatively long term loans (10 years).

Look for cash-flow near the 1% rule, hold $10k in cash reserves, and expect 2-4% appreciation. 

They have a good reputation from what I've seen but does anybody have a long-term track record with them in Memphis or Little Rock.

$500 cash flow a month is $6,000 a year.

Currently has 4 SFR all paid off and long term tenants in place.           

I have been contacted by a company wanting to lease my single family furnished rental on a long term lease for men recovering from addiction.

The total cash flow would be $3000 a month on a $200k mortgage.

If you feel that this is something that will benefit you in the long run then, why not.

It doesn't matter - You as the big bad rich landlord have a target on your back and will be named to the lawsuit and your insurance carrier will rush to settle it quickly and then you'll be dealing with the long term challenges of having that claim in your insurance history. 

I'm particularly interested in short-term rentals and strategies to maximize cash flow and ROI.