I was advised to add another level of protection which is an IRREVOCABLE Trust .

All the entities funnel into an irrevocable family truse.

Performing a prohibited transaction will result in the entire IRA account being immediately and irrevocably distributed.

I don't want to sound cold, but these funds are going into an investment that will be in an irrevocable trust for the benefit of future generations of mine.

It's not worth the stress, llc should be bare minimum, if not irrevocable trust and.other further protection.

Would your father  setting up an irrevocable  trust that would give you title to the property when he dies work for this situation?  

You can look at it irrevocable trusts to prevent some of these issues but you're better off, especially beginners, avoiding sandwich lo's completely

The carve out for trusts (not just a living trust, but an irrevocable trust as well) must be done for estate planning purposes, not on a lark because lenders are aware of assigning beneficial interests.

Otherwise they will make money at your expense .There needs to be an irrevocable option to purchase and first right of refusal to you for the property at the price of acquisition.And at the end of the exchange you're probably going to want them to transfer membership of the LLC rather than have the EAT sell the property to you. 

What matters is the economic substance: did the buyer irrevocably commit to the purchase?