How To Accurately Determine Rehab Costs

[Kaitlyn Robinson]

I saw a lot of flippers and other investors complaining about wholesalers giving inaccurate rehab costs when selling properties, and since my goal is to be as transparent as possible, I wanted to ask what is a good way for a beginner wholesaler or virtual wholesaler to find this out? I saw a video by Jerry Norton on some estimates that he claims is good to go off of based on his experience. Is his information reliable for the most part? 

Jerry Norton's estimates:
For homes under 1,500 sqft a light rehab is $18,750, average rehab is $37,500, and heavy is $75,000
For homes 1,501-2,500 sqft a light rehab is $25,000, average is $50,000 and a heavy is $100,000
For homes 2,501-3,500 sqft a light rehab is $37,500, average is $62,500, and a heavy is $125,000