I'll second Axxe on that - you would be better off buying a used 1911 and then try to upgrade when the wallet allows.
Like anything, there is a learning curve. Watch Nutnfancys on YouTube - he has a pro work on his 1911 for accuracy upgrade. Little tricks to fitting parts etc that are difficult to learn from books etc. N if you screw it up, then you have to factor in gunsmith fees and the price of the whole project goes up. Worse yet, you could end up w expensive project that doesn't shoot well.
Go to your gun club often & local ranges. Bulletin boards have ads. Some poor SOB will be either be getting married or divorced & both are often the cause for liquidation @ fire sale prices. Hell, one soon to be X-wife got so mad she sold her hubby's Colts & Kimbers for $1 dollar a piece.
Yeah, Life ain't fair but I suppose you already know that...