Contractor charges/estimate accuracy
As a newbie who is doing research for his first flip. How do you know if a contractors estimate is to high or to low? For example say the contractor tells me all the work needed to be done will cost 40,000, but in reality 20,000 is more then enough and the house can still look good and be sold. How do I know what is right/wrong basically? I don't want to get ripped off.