However, my analysis was based on the assumption that all my current tenants will for at least a year (which they have communicated to me) .  

We have a seller that has stopped all communication.

You don't need to know programming language, you just need to be able to communicate your needs well.

I agree with @Owen D. that Facebook was not intended for direct communication with strangers to solicit business, but does present a way to communicate.

What this exercise might find is:- Contractors willing to communicate and go through formalities of estimating- How hungry the contractor is for work- Which contractors answer your exercise most professionally - Which contractors go above & beyond with thier answers and their own past example work/portfolio- Which contractors accurately estimate material and/or laborOf course if they don't or won't reply, it could also mean they are too good and busy to jump through your hoops -- so they could be great contractors as well. 

I currently have a few units and I'm looking for an experienced manager who is accessible and bilingual (Spanish) to assist mostly with communication, enforcing rules, inspections, tenant screening, rent collection and move in/out preparations and evictions.

Read The 7 Levels of Communication by Michael Maher and that will give you great strategies at no cost to work your sphere.

As a broker myself, I would love to get 5% - 6% for about twice the amount of work (a little less actually since a lot of work is communicating with the other broker) but it's a very gray area ethically.  

No communication, no updates on loans, zero transparency.

Another useful thing for me would be a CRM that integrates with email/calendar and such to stay on top of communication and deadlines.