Asking a contractor to assess a property before submitting offer?

[Rudky Martin]

This is my first house purchase so I don’t have much experience. 
I just saw a house that needs a lot of repairs. However this house has a lot of potential due to its location. To know if it is worth buying it, I need to estimate how much I will have to pay to repair the house.
Is it common to pay a contractor to tour the house with me or to review the inspection report and provide me an accurate estimate of repair cost?

If so normally how much does it cost to hire him? If you know any good contractor in Bay Area, CA who is willing to do this service please recommend him to me?

Thanks a lot