It depends on many things. How old are you and are you HWP/healthy?
I know folks who did it in their 40's just in case.... I waited until I was 70 and I have updated my will twice.
Whatever happened to that thread about reverse mortgage in exchange for escort services?
I think he's just referring to a couple of houses, stock, bank accounts, car, etc. using the term "estate" is a bit grandstanding but makes sense if you have more than one property.