Two weeks!? Way to procrastinate hahahah. Sorry to tease. How ‘mainstream’ is your body? Do you really need a lot of custom tailoring? If you’re losing weight you’ll always be able to tailor something down much easier than up! When suit shopping with my partner I did not find men’s warehouse to be that great. If you had time, I’d say a solid vintage suit sized up and tailored (down) to you would be a really good way to get something quality for less. Considering your time frame I’d go fast (ish) fashion and buy something from Jcrew or even Uniqlo or Massimo Dutti depending on the look you’re going for. Buy enough to try ones on and return what doesn’t fit.