Quick question on SD 401K partnering

[Eric M.]

Well, I might have gotten myself into it this time AND my attorney is out of town!!
Couldn't resist a great property at auction today and now I have to figure out the right way to pay for it.
Essentially I have half the cash available in my S-Corp account and half the cash in my SD 401K acccount.
I have never "mixed" a property like this.

Suggestions on cleanest way to structure?
Title in 401K or Corp? Loan from one to other? Partnership on the property and keep expenses divided properly? Something else?

This will be a fix and flip and am not concerned about UBIT.