Help with Proof of Funds - Private Investor (Parents)

[Benjamin Nitz]

My wife and I are looking for our first BRRRR deal right now and we are planning to partner with my parents as our "private investors." We are looking to submit an all cash offer tomorrow, but we are unsure how to navigate getting the cash from my parents into our account and showing a proof of funds in a legitimate way from a tax perspective.

Looking for advice on how we should work through this.