I'd buy a kilometer of beach front property in Prachup Kiri Khan down towards the Chomphum end with a small beach front house. Employ a couple of helpers to run and buy food and grog and have a place where my nieces and nephew can come and visit.
I'd like to be rich just enough to be able to afford what I'd like to have but not so rich that others covet what I have because they know who I am.