I know that not enough money can mean denied entry, which I want to avoid. How much do I need to have in my bank account for a week long visit? Can I have it on my PayPal? Do I need cash (I don't really use cash at all anymore so I'd prefer not to)?
To clarify: I'm not asking how much I need to afford food and travel and housing, I'm asking how much I need so the officer at the border doesn't think I'm totally broke and came to the US with the intention to overstay and work. I'll be staying at my fiance's house so in reality I just need money to pay my half for the food, but I'm guessing that won't be enough for the officer.