Properly assessing rehab costs

[Keith Gilde]

Hey everyone, My name is Keith, and two partners and I are at the beginning stages of opening an REI company. I have an extensive background in home repairs and construction in general but lack experience when it comes to estimating larger scale jobs. My question for anyone who has experience estimating is, how accurate and reliable is estimating by sqftage, and what other forms of estimation would you reccomend? I'm new to the REI business, and BP forums and would really appreciate any feedback. Thanks!