I have heard the momma t's wealth is nearly a $Billion; but if only half of it were invested in investments that yield income, a 4% yield would earn $20,000,000. She "only" reported $5,000,000.
So she is either heavily invested in none income yielding investments or there's a rat around here.
But of course, there is a rat!
bttt
Nothing wrong with investing in Tax free munis. As for her other assets, she probably has alot invested in stocks, but doesn't show any income until sold.