Frankly, I don't trust the government to make all 30 payments, and I won't be alive that long.
I would set up a charitable trust that would pay me a handsome management fee annually (which I would pay taxes on). My needs are fairly small. I could live like a queen on $200 K. I would employ my 32 year old niece and 62 year old brother as consultants.
I would set up my cousin's son, who has cerebral palsy and is in a wheelchair, in a the nicest assisted living place I could find. My cousin and her husband, now 70, have rarely even taken a vacation by themselves in almost 50 years of marriage. I would set them up in an an apartment in a senior living facility nearby. I would pay off their daughter's house and set up educational trusts for her kids.
I'd set up a senior community as a non-profit. Units would be "right sized" for privacy, without so much space that they would be costly to furnish or allow a big accumulation of "stuff". Craft rooms, a dining hall, a garden, a would all be shared spaces to encourage socializing. I would love there myself!
I would do everything possible to maximize tax free giving. I'm fine with paying taxes, just not more than absolutely necessary.