Paying a contractor for a scope of work

[Michael Almand]

I would like to become more familiar with estimating the cost of repairs and filling out a detailed scope of work. When I ask others at my local meet ups they just reply with "I've been doing it for a while" or "lots of practice." Not exactly the answer I was looking for. What do contractors typically charge to come out to a potential property and walk through and fill out a SOW with pricing?