Here are some things to consider as you move in the direction of building your own "Handmade" 1911. It has been my pleasure to build a quite number of 1911's, Sig 229's and different types of AR's and have been involved with and assisted on numerous others.
Because of it's beauty, history and how good it feels in the hand, I was anxious to build my own 1911. I did my homework, read a lot, studied Youtube videos (thank you, Igor) and learned what was available in the areas of frames, parts and tools. I wanted to be prepared to start work when my frame arrived so I wrote up what I thought would be a minimum list of my required tools. "WOW!!!" I says to meself. So, i went to a friend from work who also wanted to build hisself a 1911 and his comment was "WOW!!!, instead of paying $700 each we should invite my two sons, your two sons and son in law, friends from work, friends from church, yer airline buddies and the whole world to join a "Cold Dead Hands" club for $100 each. So we did. Forteen guys paid $100 each for access to $1400 worth of special 1911 tools and everyone ordered parts. Work with the tool is done in my shop. No loans.
I already had a good, heavy three axis knee mil, ($500 when you find the right seller) so with the special tools we were ready to git moving. You will be directed to all sorts of good parts sources but I am going to ask you to consider that you are embarking on a totally knew direction for your entertainment.
Consider that you do not need, and at this point in your vast gun handbuilding experience you may not be able to justify, spending anything more than the cost of generic 1911 parts, some of which you are about to destroy. Do yerself the favor of investigating SARCO, Inc. They sell more 1911 parts than anyone else on earth and most of those parts go to homebuilders. Armscor, (Rock Island Armory) has long supplied parts to Sarco. Rock Island Armory also makes a respectable and favorably priced 1911.
I encourage you to look through each page of 1911 parts and kits. You might consider buying a complete (less frame) 45 kit or the 9mm kit. Most of our Club members spent about $550 on their builds. Each gun functioned correctly except the magazines did not hold back any slide when empty. Although Sarco offered to replace mine I set them aside and bought McCormick replacements.
Home finishing steel frames is pretty easy when Parkerizing or nickel plating if the builder does everything correctly. Aluminum frames can be annodized in most areas for a reasonable fee.
I encourage you as you move out on this new adventure. If you get discouraged just remember that at one time everyone on this Forum started out where you are right now: wondering, ........do I pick up the 'puter and look up Sarco, Inc., or do I open up that cold Sauvignon Blanc and get prepared for Jeopardy?