Go to Dream City Public Library at South Metro area between 8 am to 4 pm to find Katherine. She's willing to search for Britney's record if you pay her $50. Wait for a day and then return to her. She will reveal lots of details about Clara and her real name which is Elizabeth. Go back to see Damien. He will then reward you with a diamond ring worth around $800 to $1000.
You can sell the ring to Pawn Shop at Old District for cash. Now you don't have to worry about money. At least, for now.