If you will have them stay I would add a security deposit and explain that is policy for you.

Whole life insurance policy (highly recommend this!)

Unless your market is really slow, you're usually better off holding out for  someone interested in moving in earlier.My written, published policy is that I will hold a unit vacant for one week.

In the years since 2008, there has been a very steady growth of comfort surrounding stability and the expectation of economic safety. 

It make the case the "drive to" spots are going to become increasingly popular due to the perception of greater safety. 

Do you like it because it adds value or do you stay away because of the maintenance and the safety of it (it tenants have young children).

@Logan Hassinger  The scammer is clearly violating Gmail's Policies/Terms of Service. 

They said I either "pose an elevated financial risk or violate their own policies" but they are "unable to provide any further details" I'm just a dude with some properties that I rent out.

I was thinking of paying one off as security/safety net or like you said peace of mind and then continuing to build!

The amenities may be basic but the service should be class-A.have a worldview that is empathetic to poor people- ie they don't believe that poor people are poor because they make bad life choices; actually RESPECT THEIR (D-neighborhood) TENANTSdoesn't have the unrealistic expectation that low credit score tenants will respond to incentives designed for tenants with a credit score to protect and sets payment policies to promote desired tenant payment behaviors for low credit score tenantsprefers to achieve goals by eliciting cooperation instead of the exercise of power;communicates clearly and directly (even on 'awkward' topics like money and complaints about 'peculiarities')likes to solve problemsHaving said all that, I would still recommend B neighborhoods if you can afford it because of appreciation (and as @Erik Whiting said, exit strategy) .