Had my inspections done a month or two ago and they checked about a dozen items per property that had to be corrected and told us the properties were deemed "uninhabitable" until then and no one could stay in them.

mario,  correct on the math.Now for sure you need to rehab it.

The remaining lone balance for house a is $117k, correct

I had my husband request membership to see if he can message the admin the correct information in that group.  

You are probably correct.  

I just did an analysis of 5 PM Software Tools for DIY Landlords under $20/mo.

I think I should correct myself and say that builders are certainly not the only ones to reap profits from there. 

To the other experienced investors out there am I analyzing this correctly?

Take a look at the BiggerPockets Market Finder tool to start looking at different markets based on your goals - https://www.biggerpockets.com/markets2.

Refi: The piggyback HELOC is a good tool for quick access to capital, but since it's been delayed and you're already tired, it might be worth waiting for a combined refi and HELOC.