Go in the house after the part where your partner has the package with him. Go upstairs at the first staircase and kill the garrote wire. Wait for the maid to leave the next room. You will then hear a guar talking to her before she walks away. Kill that guard while making sure the maid doesn’t see you. Keep following the maid through the door on the right and silently kill the guard while she is facing away. Behind the maid you’ll then see a money bag that contains $20,000. Note: Stay crouched and use the garrote wire to stay quiet and not get detected.