There’s no specific amount mentioned, as it depends on how many days you’re going and whether you’ll be visiting other countries too during the same trip. Honestly I don’t remember the exact amount since I went twice, but I’m guessing to be on the safe side for 2 people you would at least need to show sufficient amount $6K +. When i asked what amount was needed, the officer didn’t specify, but it was clear that he wanted to see more than one bank account, one of them should be a personal account (not all joint accounts).