$1000 is an entry level 1911! LOL. Alot of work goes into building a 1911, thats expensive. Folks building $3K 1911's aren't ripping anyone off.
Mine usually get new 47D Wilson mags, 16-18# Wilson recoil springs, and Alumagrips nearly imediately.
Then theres the eventual replacement of the safety, ejector, and slide stop lever to get rid of the cast stuff. Remove the shwartz safety.
Shoot 2000 rounds.
If the gun proves reliable at this point then I send it off for a modern Melonite refinishing. (1911's rust for fun)
Do the math on that. I spend alot on a 1911 before I trust it for carry. Then again it's competeing with my Glock.
My favorites to start with:
Kimber Custom II 5", if you want front grip checkering and night sights then TLE II.
Springfield GI or Loaded 5".
Colt 5"