I get a lot of questions about how much to pay for a rehab. You can find a full article on the subject here: https://investfourmore.com/2014/11/03/much-cost-fix-repair-house/
I am a house flipper with 19 active flips at the moment. I spend a lot of time with contractors and budgeting for repairs. This video gives an idea of what I pay for a rehab on one of my houses. The costs can vary greatly based on the contractor you use and where you are located. The more sub contractors you use, usually the cheaper the rehab is. If you use a general contractor the costs can really increase because they will charge a premium to manage the project.
There are some contractors who are super expensive because they know home owners do not know what repairs should cost. You have to take your time finding contractors and comparing prices to find affordable, but reliable companies. You usually do not want the cheapest when hiring contractors, but it is tough to make any money if you go with the expensive contractors.
Here is a another article on how to find a great contractor. https://investfourmore.com/2014/03/10/find-great-contractor-fix-home/
Here is the after video of the home! https://youtu.be/cSDEdW4iN-c