Calculating Renovation Numbers - Chicago Area

[David Gillette]

What would you recommend as the Top 3 Rehab Cost Calculators to be used in the Chicagoland and Suburban area? I'm trying a few different calculators with huge swings in the numbers. I have a manual sheet I use which calculated  about $56K in cost and then try an online version of a cost calculator and came up with $118K. I just want to always be honing my method of calculating numbers because that is the hardest, most subjective and most critical part of the deal.

Any advice would be appreciated.