LOC's can have negative effects on your future purchasing power if not set up correctly and keeping in mind you can "never" use an LOC as a reserve or asset.It will always be a debt burden and can over inflate your back end debt ratios depending on the W2 income and your liabilities.

In college, work on the basics - get good grades, don’t get into debt, build your credit, etc.

@Tanner Lewis, is right, if you want to consolidate all of that debt into one loan then place all the debt so it is secured by the property, sell the property and 1031 into another property with one loan.

Doing a conventional loan for each property is out of the question due to my debt-to-income ratio. 

I always pay off my highest interest rate items first, especially if its debt.

Maybe get your debt paid down, get your first deal, get some savings built up, then reconsider the potential change. 

Quote from @Dee R White: I'm out of debt, don't really plan on using my card much except for emergencies but the recovering spendthrift and the riskier investor sides of me - are curious if I should call the company back and ask for them to raise it back as it might affect my credit score. 

We bought it for $225k with a 3.125% mortgage and 1) are interested in keeping it as our first rental. 2) We are thinking about using some of the equity (maybe $50k or less as a HELOC to combine with existing cash for our next home down payment that we can convert to a HELOAN through our credit union).

My question is "for anyone with this particular experience" Is it a far fetched idea to do a cash out refi on house "A" to payoff some personal debt and large payment on house "B" to knock down the principal?

I'm using a combination of MLS comps provided by realtor, redfin, and backflip analysis tool.