I need to find something that is not too far of a drive (McKinney or Rowlett are what I would consider a reasonable maximum commute time) and where I won't get murdered or robbed every few months.

That should help drive your decision on hold or sell.  

I am happy to drive for dollars, but that will involve one of those Google self-driving cars and a guide dog trained to sniff out potential deals.

I will now be paying more attention to that factor. 

And the HELOC payment will go up with interest rates and at the end of the draw period so you have factor all of that into your analysis.2) That depends on the terms of your HELOC.

I shudder to think of what would drive me to consider "selling" my properties to a wholesaler.

Your success here depends on the quality of your list but good quality generally speaking could be 1-2% (so $25 - $50 per lead)FB prospecting is very untargeted as the person has shown no intent (you're probably just going to use targeting such as the zip code and potentially one or two other factors that you can target with using fb relating to home ownership and income or debt levels).

and a pedal pub to drive in between the two!

@Matt Morand If you use a PM, you always need to factor in the costs of bringing new tenant in.

These factors ultimately increased my mortgage payment thus reducing my cashflow to about $0/ month after accounting for vacancy, capex, PM fee, etc.