If you’ve won the lottery (500 Million), what would you buy first?

If I were a rich man,
Daidle deedle daidle
Daidle daidle deedle daidle dumb

I'd build a big tall house with rooms by the dozen
Right in the middle of the town,
A fine tin roof with real wooden floors below.
There could be one long staircase just going up
And one even longer coming down,
And one more leading nowhere, just for show.