SF housing near financial district for 4

Looking for:

• Long term (1 year or more)

• 2 bedrooms (more bedrooms, better)

• 2 bathrooms (this could be relaxed)

• accessible to financial district (<30 min bus or walk, closer the better) and at the same time close-ish (<30 min bus or walk) to caltrain station

• price range looking for around $6 k per month.