The assets they can go after is capped by what the LLC owns not what YOU own.Now generally speaking, is the LLC a good solution or not, it's debatable.

I have a buyer whos lender wants a copy of the HUD-1 on a house that was sold in 2003. They don't recall the agent or the title company because it was so long ago. Does anyone know how to get this, and why they would ...

I am planning to create an LLC with the Solo 401k trust as the member to provide liability protection when I purchase real estate and some separation of assets within the 401k. 

That's probably your best bet for the refinance.Otherwise, there are long-term asset-based lenders as well, but they're going to be a bit more expensive.

They then use these funds to invest into whatever asset they choose. 

My first purchase I used a partner to obtain the bank financing as well as the down payment so I was zero out of pocket on my first 4 or 5 deals (all of which with purchase prices well under $200k.There are many ways to skin a cat so if you don’t qualify for the traditional bank loan, get creative but in doing so, be very careful in using OPM.

@Chris Pohlson get educated on commercial/mfam and financing associated with the asset class. there's more scale and the financing (debt and equity) can become easier. 

My goal is to obtain zero financing and purchase a 2-4 unit property out right.

Having them obtain a permit also connects them to the job.

Note the the law sees it different (they see an single member LLC as a different entity and hence you get asset protection...if everything is set up right).However, the IRS disregards the single member LLC for tax purposes.