I once actually planned this out once, when there was one of the big jackpots – I think it was close to $300 million
I said that let’s say, after taxes, you have $100 million left. $10 million is maaser, so you’re left with $90 million. I’d just stick it into a high interest account. For that much, you can probably get 3% or 4%. I’d open a kollel funded with the interest. It would be an exclusive, invitation-only kollel. I’d build a large house, with lots of bedrooms. I always have guests, but don’t have enough room for them to sleep. If I had lots of rooms, I wouldn’t have that problem.
With the rest? Who knows.