But if you are already worried about paying back that HELOC out of the property you buy, you are creating a house of cards from the start depending on how good of a buyer you are.

People are turning to their credit cards to buy food.

i get cards, calls and texts every day from wholesalers for my little portfolio - so that shows you how much competition there is out there.it's also tough to do as a beginner in real estate, because the best wholesalers surface strong deals and know how to estimate a rehab.  

They were actively trying to open credit card accounts in his name I seen on his credit report.

As an example: the lender asks for a payoff letter for a credit card or some other debt so that it can be paid off at closing.

Or if we start taking direct bookings, we can get a deposit or have a card on file to cover damages that they cause. 

Also, do you have any 0% interest credit card offers that could help fund/pay the roofers in the meantime?

Most sellers want to hold a business card.

I haven't done so yet, but it's a good card to keep up your sleeve for when you are ready. 

Nowadays you need to consider credit card functionality, too.