I have a rare Norinco 1911 - rare because it wouldn't shoot worth a darn. I mean it wouldn't group better than 8" from a rest.
I put in a Fusion barrel with a tight bushing and now the ugly sucker will shoot with most any bullseye gun. I changed out the sear and hammer (hammer only because I like a wide spur type), went through the gun smoothing and honing, and used Colt springs and now that pistol is still ugly but it's one of my favorite 1911's. A real sleeper at the range.
I do all my own work except good finishes. (I beadblast stainless here, but can't bring myself to paint a gun yet so send out for blueing or Ionbond.
I'm not so sure that you could have someone do all the work on a Norinco and beat the Kimber prices. Kimbers aren't really that much comparatively, and gunsmithing doesn't come cheap.
Yes, the Norinco steel is harder than what's generally used in the US but it would work against you in labor time to do things like sight mounting, checkering, or any of the fine fitting. Parts add up too, and you could easily find yourself with a $3000. Norinco. That'd be bad.