The meaning is contrary to the fact.
The pattern is :
What would you + V1 + if + S + V2 + ... ?
Examples:
What would you do If you lived in Mars?
If I lived in Mars I would establish my own kingdom.
What would you buy if you had a lot money.
If I had a lot of money I would buy an island.
Let's start
What would you do if you had 55 hotels?


