when someone's ship comes in
when (one's) ship comes in
When one becomes wealthy and/or successful. When my ship comes in, I'm moving out of this disgusting little apartment first thing!
when someone's ship comes in (or home)when someone's fortune is made.
This expression dates back to the period of Britain's maritime empire, when the safe arrival of a valuable cargo meant an instant fortune for the owner and those who had shares in the enterprise.