@TaxGuyBill "each of the four properties should be in a separate Single-Member LLC "

There are two kinds of states:  Those like California that already charge an annual fee of $800 for each LLC; and those who might think about doing it because they are getting a lot less money from Washington to care for the sick and elderly.  

The truth about LLC's is that they will get you as much asset protection as you can buy for $5 at Starbucks, and that comes with a cup of coffee.  If the LLC is going to get sued, its single member is going to get sued as well, and easily found liable either for negligence or tortious interference with contractual relations.  Before talking to a lawyer, talk to an insurance agent about an umbrella policy.