Neither neither myself or the other agent have more than a phone conversation invested so far

This implies the $200/month cash flow in unlikely to ever be worth more than the $200.I recommend all investors start local but you seem to be adverse to that so I will go with another one of my common assertions: The only Midwest investing that makes sense for most Coastal So Cal/San Fran RE investors is true MF (5+ units).  

Tenant has no phone, email. 

[Lenders commonly use 70% LTV for investment loans].eg.

Your first and last name, email address and phone number
2.)

At this point most of my communication is done via email with the occasional phone call.

I have not been getting any responses through Craigslist, especially because the contact phone number is "encryted" (wrriten-out) to eliminate SPAM and SCAMS.So,  my questions are:Should I be using a different rental approach?

On the phone, learning the basics, making my contact base, social media to the core!

These seems to be a common unanswered topic.  

The common denominator here is a PM.