Options for Cashing Out Retirement Accounts?

[Heidi Emmendorfer]

Hi, we have some retirement accounts we're considering cashing out for real estate investing purposes. We have a 401K, Roth 401K, Roth IRA and a Traditional IRA Brokerage account. What's the simplest and cheapest way to get the money out?

We can use a HELOC on our personal residence and cash from said accounts to invest. Since it's a first-time property, we'd only borrow from the HELOC what the retirement accounts could pay back.

SDIRA is not a feasible option from my research. I want the immediate cash out from flips which SDIRA's do not support. Tell me where I'm wrong. 

Thanks!!