While they may not show up on your credit, they will ding you for credit checks.I operated for about 15 years before I set up a C-corp.

Right now, we’re carrying about $60,000 in debt ($40,000 in credit cards and a $20,000 car loan).

@Eric Huntermark Unless you're already independently wealthy, a conventional loan product (assuming this = bank/credit union loan), is going to probably be less attractive for you and most banks/credit unions don't lend to flippers.

At this point, I would recommend having a line of credit to cover these things so you don't have money sitting in the bank doing nothing when it could be put to work.I have 33 units, no debt except for mortgages, and excellent income.

If everything else checks out (credit, talked to her employer, background check, etc), I would try to validate the story with the landlord.

I personally used business credit cards to BRRRR a deal—no money came out of my pocket.

You have a great credit score. 

Assuming you go the HELOC route, another option to reduce your costs assuming you have decent credit is to look at credit card balance transfer promotions.Back in 2003-2004 I had HELOCs on my investment properties and interest rates were increasing.

Conclusion: Don´t give your credit card infos for "free" products!!!

The credit cards can be stifling, but in the grand scheme of things, $40K isn't a ridiculous amount.