My thanks for the thoughtful suggestions.
I laughed out loud on the deca millionaires driving beat up cars comment. I can see how it might look like my $30K car being beat up but its a pretty nice Acura SUV, pretty modern with all necessary current age gizmos that serves our purpose.
I do file FBAR, although FBAR is more on Foreign income and not just assets holdings, it does focus on financial assets, my real estate assets dont need to be declared in there far as I know, only the income on those assets towards rent proceeds etc has to be declared.
I had thought about straight up MUNI ladders as an alternative, but Vanguard Bond ETFs is also a good idea, lot cheaper in terms of cost of entry. Couple Citibank Private client reps are on my case to earn some commission on MUNI/bond ladders.