I love when my kid finds stuff.
Real, and ancient.
+1 - All the T&A items I've had have been made by Chester Barrie as well.
AND pick it up! They sell for A LOT!
What you have there is a suit that's all around too big for you (except, it sounds like, at the shoulders). For the cost of all those alterations on top of what the suit already cost you, you'd be better off selling it and buying one on eBay or the Marketplace that's more in line with your measurements, or offering it up for a trade here.
Pre-owned Canali suits on eBay cost anywhere from $70-200 on average. The cost of your suit + alterations would very likely be more than that.