In my research on the subject, I've run across a couple of strategies for real estate investing. I have read that it's important that your LLC be set up in a state that charging orders are the only remedy to be used by creditors to get at a member/debtor's LLC ownership interest and they not permit an LLC owner's personal creditors to foreclose on the owner's LLC ownership interest or get a court to order the LLC dissolved and its assets sold. The most common states for this are Delaware, Nevada, and Wyoming, but other states (like my state, North Carolina) offer similar protections, although it's not always clear what its position is on single member LLCs in terms of them receiving the same protections.
Also, I see discussions of "nested" entities where a primary LLC is established in a state that provides the above-listed protections and then that LLC is the sole manager of a separate entity created in the state where the asset resides. Theoretically, you could create a new LLC for each property you owned, but I would think that could become cumbersome at some point.
For notes, since they are considered personal property, I have heard that some investors have used personal property trusts to further isolate them from the investor's personal assets. I have also heard that a personal property trust can be funded by a self-directed IRA to buy real estate.
Of course, you need to talk to your accountant and attorney about this, but I would be interested to hear what other investors have done.
Thanks,
Warren