PMC RECOMMENDATIONRecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

Remember this all good cop bad cop good agent bad agent is only self-proclaimed imaginary status lol

Some companies offer social media marketing as well. 

Plus you can report on the people even to the limit of getting their sec8 status removed so the treat the property well so they can keep their section 8. 

Do they have an ITIN number or permanent residency status? 

Main part as a licensee is disclosing license status and whatever state law requires with that specifically.

He collects social security and has a part time job.

I'm not sure if you're working with a financial advisor but if you're retired, receiving 1099R income, maybe social security, plus income from other sources you definitely want to speak with an advisor.

How it seems like a good idea to use social connection as a criteria for what is one of the most important financial decisions in a consumers life escapes me.

Look for reviews, recent closings, social media presence, and responsiveness.