Otherwise, the SD IRA is a great platform.Compared to an IRA, Solo 401k contributions limits are roughly 10x higher and there is no custodial requirement for the 401k.

Also, full disclosure: I work for a trust company that specializes in providing custodial services for self-directed IRAs.My reason for offering a reply to this rather stale topic is that it seems to me there is a lack of clarity in the responses when viewed as a whole.Let's look at the original post. 

Also you should to be aware of the difference between self-directed custodial Solo 401k vs. truly self-directed Solo 401k plan. 

Even in the double closing situation, It’s hard to imagine this event being construed as a real property disposition, especially if you have no right or custody to the sales proceeds of the property per the terms of the contract (though I’m not familiar with how these are worded).

Here is a list of lenders offering such loans to IRAs:https://www.biggerpockets.com/blogs/2810/50272-lis...Leveraged real estate in an IRA will trigger UBIT.An alternative to self-directed custodial IRA might be Checkbook IRA, which will enable to you have checkbook control over your retirement funds and will eliminate transaction fees.

A prenup is not about being greedy, it's about protecting both you and your spouse from divorce lawyers and custody evaluators and the court itself, who all have every incentive to push your case until both of you run out of money.

For example some custodians will have tiered pricing based on account value and how many assets are held under custody.

I only leave a few hundred dollars in custodial funds to cover the fees. 

With very serious penalties @Jon Holdman (the @ won't work for some reason), also not a lawyer, but it was my understanding that "familial status" meant (from justice.gov website) :  "familial status" means one or more individuals (who have not attained the age of 18 years) being domiciled with--(1)a parent or another person having legal custody of such individual or individuals; or(2)the designee of such parent or other person having such custody, with the written permission of such parent or other person.....

Being in CA is a significant blow to the IRA LLC, because of the fees charged by the state, but in many cases it is still worth it.The Solo 401k does not have the custodial requirement, so no LLC is needed for checkbook control.