• In cities like Amsterdam and London there is a relation between salary and max. rent allowed (for a E1000 apartment you need 45x the year salary, so E45.000). What's the equation most rental agencies use in the US?

• I possibly have to relocate to San Francisco from Europe, so I will not have any credit score. How difficult will it be to rent a 1 br apartment (starting from $2500) without a credit score? I will have a good salary.