My dad = trying to do a cash-out refi with credit under 600

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How can he do this?

I have a relatively decent credit score of 720ish, but no income.

Is there such a thing as blending us two together for a cash out refi?

The property he's/we're trying to borrow against he owns free-and-clear.

We're trying to get a loan in the 5-6 figures as soon as possible to fund an investment opportunity. Trying to have funds by the end of this year if possible, but not essential.