For perspective, $30 billion would afford the food and freight to feed every human on Earth for a year.
Less than that would make him a god in Haiti (that is, elevate the nation out of crisis and put a bronze statue of Musk in every state park commemorating how awesome he is.
A few billion could provide free high-speed internet to everyone worldwide. Curiously Musk considered this, but then wondered how to get everyone to pay fees for it.
ETA I got these values when we were discussing Bloomberg's wealth in 2019 when he was trying to Secret Hitler the Democratic party, and how much could be bought with the $500 million (at the time only 200 million was declared) he spent on his campaign. The $30 billion to feed the world value came up in in one of the news articles.
Well, the economy is much different and we're dealing with considerable inflation (and our billionaires, including Bloomberg are much richer.)