We will always give a GC the opportunity to bid the entire job but if his cost is out of bounds then we may give him the demo, plumbing, electric,framing...Stuff that may require permits,  but once everything is inspected & it's time to close up the walls or right after the walls are closed the remainder of the job may go to handymen with the same skill set as the GC, but not the license or overhead.  

So on paper it seems like not much, but it can be 40% of the overall time to complete job, depending on full scope.Assuming you are gutting and starting from scratch, I would outline:- Draw at completion of demo- Flooring installed and covered- Electrical rough in passed- Plumbing rough in passed- Drywall installed, mudded and sanded- Cabinets installed, with any crown and pulls- Counters installed-Backsplash complete (installed, grouted and caulked)- Electrical final inspection passed- Plumbing final passed- Paint- Floors finished (if hardwoods)

Comes with experience for the most part for example paint = x per room or sqft or flooring per sqft + demo.

I want your input and thoughts.DivDescriptionCostUnit1Engineering Structural$350-$5,000EA2Asphalt Parking Lot$10.00SF3Asphalt Striping$0.75SF4Sanitary Sewer$2,000-$20,000EA5Storm Water$10,000-$20,000EA6Water Mains$2,000-$20,000EA7Tree Removal$2,000-$10,000EA8Demo$540.00Unit(1000SF)9Counter Demo$250.00EA10Mold Treatment$400.00Unit(1000SF)11Concrete Sidewalks$6.50SF12Curb and Gutter$8.50LF13Brick Veneer Repairs$1,000-$25,000EA14Brick Point Up$40.00SF15Metal Pan Stairs New$7,750EA16Ext.

Depends on demo and finishes and if the style needs to be changed.  

Quote from @Branden Yang: Why are you basing your investments on other people?

You will be taxed up the Ying Yang and pay interest on the loan?

We were expecting to find 4”x4” posts in the wall or two 2x4 joined posts (for a true size of 1.5”x3”) worse case   When they demoed to put in the new posts, that huge beam (not sure what it weighed but new beam is 900 lbs) was on 2”x2” posts.  

The eventual buyer would deal with either leaving the sheds, or demoing them as they wish. 

Complete kitchen demo and remodel.