Would you represent yourself in court rather than hire an attorney? Would you treat your own illness rather than hire a doctor? A Realtor can provide you with market information and professional advice based on experience and training that you can't get right out of the gate. You are starting a serious business. Flipping houses is not something to leave to chance. I am certain that you aren't doing this with plans to fail. Surround yourself with the professionals that you need to be successful. Hire a Realtor.