IRA and 401k Investing

[John S Lewis]

Hello - can my wife use her IRA to invest in my LLC? Not as a real estate investment, per se. But more like a note payable? Also, she is still working, but has a 401k. Can she take some of that money and put into a self-directed IRA? Can this be set up as a check book LLC?

Any other recommendations ?

Thank you.