If I ever get into 1911s, and that's a big if considering I've shot and handled plenty but have never had the urge to buy one, I would want to do an 80% build or at least assemble one from a frame. I don't see the point of buying one anymore when the aftermarket is so huge. Yeah, I would need a lot of help. No, it wouldn't be cheap.
But. I'm not the OP. So, I digress.
I don't see the point of building one when you can buy one for far cheaper than than the net total level of aggravation it takes to hand fit a 1911. If you get to the point where you can do it well you should probably get an FFL and start doing builds for profit.
To put those guns together, so that they A. work properly B. don't destroy themselves (you can build a 1911 that seems to work, but will literally destroy itself with enough rounds through it if it isn't fit right) and C. don't look like a poorly hewn piece of shit, is kind of a work of art.
Now, in saying that, there are shortcuts companies make when making cheaper mass produced 1911s... but then if you try the same thing, you're likely going to end up with a similarly bad
result, or not have the luxury of playing legos with bins of parts like they do at a lot of the places with mass produced guns. Of course one shortcut you can take, is I believe at one time
some vendors like Caspian would sell you a frame and slide that were basically fitted to each other, but the rest was still up to you. That cuts a lot of the bologna out of things for not much
money. I dunno if they still do that now.
Most people I know that go "I'm going to build a 1911" the pile of shit collects dust in a box somewhere, and then they eventually end up going to pay someone else to build it for
them. If they weren't a pain in the ass, everyone would build them. And good smiths wouldn't get a ton of coin to build them. They charge accordingly because the guns are a pain in the ass to do right.
Many years ago before you appeared here there was a group buy on 1911 frames and slides. From what I remember the overwhelming majority had someone else build the gun out for
them, maybe like 3 or 4 guys did it themselves? I forget. I know there weren't many that didn't get jobbed out. If anyone from that GB that built their own is still around, it might be educational to cstockwell and others about how intricate these things are, to do them right.
ETA: Watch those videos of the dudes in the phillipines banging out illegal 1911s from/near Danao City. They're not pumping them out in big volume. They're doing a few guns here and there, not even one a day. And those guys are experienced.