That layering you are describing sounds really complicated for small business owner because you have to manage each of them as a separate entity (meaning financials, taxes, meetings if required in your state, paperwork for transactions between enitities, IRS stuff for each entity, etc). For example I had an LLC for a while. I sold and rented some equipment to the LLC. I couldnt just take the money and start using the equpment. I had to make a paper trail that detailed the transaction, create recipts, cut checks, it was time consuming and a little weird since i was both sides of the transaction. For each entity create and layered in you will need separate articles of incorporation or by laws as your state requires. Some states require certain entities to meet with their boards and require minutes to be archived.
As a small business I see this as potentially increasing your costs in the long run and potentially setting up more opportunities to do something that would allow the courts to peirce your veil protection making not only the business assets you want to protect at risk but also your personal assets.
I’d do waht bodegahwy suggests and explain your concerns to a local attorney and cpa that understands small business and they can suggested a course of action, probably the best few hundred dollars you can spend.
With proper planning you can minimize any risk to your assets but nothing will give you 100% risk free protection simply because when it goes to court you are introducing a thrid party opinion and interpretation. While I don’t personally like to do business as a sole proprietor I know people who have for 30+ years in different industries but they all took steps to minimize thier personal risk.
Bryan