Salary for a Super Shuttle van driver in Austin, Texas? -

Does anyone know the salary for a driver for Super Shuttle for the Austin, Texas area? I was offered a position as a driver and have never done this type of work before. I have a great personality and get along well with people. I know the majority of the salary is based on tips and I wanted to see if anyone out there could share their experience? Or known of anyone who has done this type of work before?Thanks in advance for your answers! Hope you had a great holiday weekend!

Based on the sites below, I d estimate between 19K and 27K annually.