You must be delusional if you think a regulated industry would be simple, like learning to push widgets down an assembly line and get paid for just turning a screw and closing a lid on some contraption.

It is almost a certainty that the EPS is not taped to provide you an adequate vapour retarder on the warm side of the wall assembly.  

One of the distinctions is the team the assembles/frames the project is one of the team members (no learning curve).  

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With G-d's help, in four short months the bankers and managers at my bank know me by first name, I have assembled two separate rehab teams that will follow me to the end, the Housing Authority officials think Im God (funny story, for a different time), I've had lunch with the founder of the largest tax lien buying company in Chicago, I have four big players as mentors and friends and I have true satisfaction in every waking hour of my day.

I sound like such a newbie but I am on the transaction end doing sales in commercial and the landlord and contractor part I am newer at.On the commercial land development projects I would assemble the parcels but didn't mess with the construction or the budget side much.Always more to learn.I appreciate the Dalton connection for savings J Scott.I am wondering if I sign up for Home Depot or Lowe's and save 10 to 20% on what I buy plus they install reasonably and I do Loc's suggestion of buying gift cards for less than face value if I can get for 50 to 60 cents on the dollar for rehab.

There may be questions in between inspections; framing, thermal and then finish.I wouldn't think of NOT mechanically fastening the wall assembly.

If you want to know the differences, take an educational course outside the world of gurus, who present real property as widgets off an assembly line.

@Davinder HansFire separations are assemblies not just one of the components.  

To date, have been unable to assemble the skills to cost-effectively perform such retrofits in remote markets and have yet to find a turn-key operator who puts efficiency at the core of their product.