Quickbooks allows for you to add multiple debit & credit cards/bank accounts associated with a company.

I'm curious about how they are able to convert your business credit cards into a cash line of credit while avoiding the high balance transfer interest rates.  

I looked into 0% cards to balance transfer but with my self employed income and my wife’s name change, it’s proving to be a nightmare.

I am under contract for my second duplex, and am thinking it will be time for me to begin hiring out lawn care, as I do not plan to have means to transport equipment between properties or dedicate time to a low value task.

It runs $50/yr if you want it to download, input, and reconcile all your bank and credit card charges automatically.

Yes, using equity/credit cards/non-mortgage loans can be dangerous if you don't know what you're doing. 

He mentioned having a second mortgage on the house (orig. purchased in 2014) and credit card debt and that’s why he needs to sell even though he says he really doesn’t want to.

Paid off 1 personal CC card from last year and working on the car, I always have revolving CC debt for the businesses :)

Not to mention the fact that you can get financing with 0% interest with a credit card if you were in a pinch.  

Ask your parents to add you as an authorized user on their credit card, then put it in a drawer.