If you are following the rules then everything should be OK.This is no different than a health inspector visiting a restaurant.

As they are in their mod to late 70's and in declining health. 

I thought I saw it listed as a half way house or mental health housing.

Good luck and keep that mentality of respect towards others situations. 👏 

Then do a thorough research on tenant applicants (note: leaving this to a PM may be hazardous to your financial health) and choose the one that is most “stable” with the best potential for long term tenancy.This advice is contrary to maximization of rental income, but IMO will reduce expenses of tenant turnover, property damage, property management fees so much that the difference in bottom line income will be quite small.  

This kind of move could really lower the barrier for people trying to get started in real estate investment.By the way, if you're into lifestyle topics or investing long-term in your well-being, I recently read a theraface depuffing wand review on a site that also covers a lot of beauty and health trends.

Latest is prop 33.  3rd attempt to pass this with aids health foundation having spent mid $40m last I looked.  

Sellers may struggle to mentally shift from "owner" to "tenant," which can create challenges with boundaries and property care.Security Deposit:If you’re doing a temporary leaseback, be sure to collect a substantial security deposit to cover potential damages and ensure they vacate on time.

Health insurance payments, Health savings account lots of options. 

As long as no “healthcare” services are provided (like medication or personal care), it’s not regulated by the Department of Health.