If the LLC is not an option with the realtor business (eliminates S-Corp election option) then I don’t think it is worth setting something up for investment purposes assuming you don’t already have a large RE portfolio.As for your other question, for most of my business owner clients I recommend using Interactive Brokers because interest earned on just cash (not putting it in any financial instrument or security) earns a very competitive rate relative to the many alternatives.

@Grant MedCheck Fannie Mae security instruments and notesThey are standard forms Make sure to get an attorney involved to draft all docs

My Dad used these in the late 70s into the 80s its a very clear and concise debt instrument that actually explains these wraps very well.It was to my knowledge first created in California were we had our operation..

CA has whats all an AITD  "All inclusive Deed of TRUST" this is a brilliant debt instrument.. that allows you as the seller (beneficiary) on the wrap to foreclose without any legal snags.U have to continue to pay the person you bought property from though and that is the EXTREME risk to selling on Wraps if you have little to no reserves.. your buyer defaults and now your chunking out money monthly why you are foreclosing which takes a year in most places and cost 3 to 10k in most places.

There must be so many of then the Clerk has set up the term as an instrument type search term. 

I think the problem sometimes the bp community runs into is the people most attracted to these ideas are often the least financially sophisticated people, they don’t understand risk, they don’t understand cap rates, they don’t understand debt structure and instruments, they often don’t even understand basic financial concepts.

WA actually has one of the most unique instruments to convey SF. 

It is not a debt instrument, you can put it in your Red Flyer wagon and haul it away when disaster strikes.Or drive it away, whichever 

If you did not have them sign a note and a security instrument that will make it 10x tougher.

It's an amazing instrument IMHO.I should mention - an experienced investor friend told me he only gets mortgages/refinancing on properties, never HELOCs, because any line of credit limit can be shrunk down suddenly by the lender, any time they want to.