My question now is, is this just the nature of the rental business or am I right to continue with eviction and find a better tenant?

I have William Bronchick’s following Dated Courses: Flipping Properties, Rent-to-Own, and Alternative Real Estate Financing; All three courses, the contracts and dvds are still in tact (like new condition) Would you sell these, or keep in your real estate library...even if some techniques and/or procedures are outdated?

Probably "listing manager" or something of that nature. 

Its the nature of this business.

[Natural disaster, huge sinkhole where earth swallows it all up, etc] - insurance?

I followed the link Account Closed posted and based on my natural pettiness would be likely to pay the $30 even though I think collection probability would be low just so when their credit is pulled there is a clear scarlet letter warning future landlords this person is a deadbeat.  

Encroachment of this nature should not impede your ability to sell in securing lending for your future buyer. 

Concerning the call center it is a double edge sword I would have a procedure and action plan in place before just getting a call center setup. 

Human nature at work.

And naturally quit my job the next day..