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. 

Just focusing on reducing debt , I tutor chemistry which has been helping with finances.

Remember you are using debt to make this investment, not reserves  sitting in your bank account so I recommend a more conservative investment approach. 

He seems to lump all debt together.

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?

Generally ive offered equity or debt on deals but never on the operations.

There could also be a change to the HOA by-laws eliminating the right to lease and alternatively if too many units are tenant occupied it could impact the warrantability of the financing which would be problematic if you wanted to sell the unit.

It may be worth the investment if you decide to do out of state to eliminate any potential mishaps when it comes to timely repairs if needed. 

Used a HELOC on a primary, and was sure that even with that additional debt-service, there was + cash flow.

They show some creative ways to borrow money or to payoff debt using credit lines but their disclaimer is to see your cpa and/or lawyer.