We recommend that you check reviews of the lender; Ask for references; If the lender is advertising something that is outside the normal metrics for the industry it is likely a bait and switch. 

First thing is NEVER feel concerned of hurting someone's feelings or ego, your reviewing to employ them, that makes you the boss doesn't it?

As an investor here myself, I can tell you we're seeing solid rental demand here thanks to the strong job market and major employers developing here. 

I am planning to self manage as well and since there aren't many managers in my area I will likely employ a similar strategy once I decide to outsource the management.

Solid employment history.  

HELOCs are much tricker than a closed end second - they don't typically allow you to close in an LLC and they are full doc qualification, meaning your FICO, employment history, income, DTI etc all come into play.

I'd have them sign my own lease on renewal and I'd make sure I had enough information on them so I can go after them if a legal issue arises such as employer and other similar data. 

I use the 3x rent for my first barometer, steady employment, good credit, and of course 3 years of rental history.

Expensive markets are often desirable because many people want to live there, driving up demand and prices.Reno, NV, for instance, is a market that benefits from diversified employment sectors, including tech manufacturing, hospitality, and recreation.

But if employing your family works for you and for them - great, go ahead.