How much time should I wait between family loan and applying?

[Jake Springs]

We have $70,000 of credit card debt that gives us a very bad debt:income ratio. My parents are willing to lend us most of the money to pay that credit card debt off so that we can get a good cashout refi. But I know that banks want to know where big recent deposits came from and that they don't reflect new debts that need to be considered. The loan money from my parents is coming from their relatively small life insurance policies (they have bigger ones) that simply reduce the death benefit by exactly what we still owe, and so my parents don't care if we pay the money back or not. It will accrue interest (5.8%) until the total value of the policies is reached, and then the policies are basically made null. Or we might pay them off if our business has a good summer season. Either way, it doesn't affect my parents' estates or level of comfort much at all. Sorry so complicated. Anyways, how far back will lenders look at such big deposits? I can hold off on applying for a refi as long as I need to exceed this period of time. Thank you! And please don't judge me on the debt... We have paid off a LOT more than the current balance and have learned our lesson. We just hate to lose a chance at a refi with these low rates.