[Hack&Lube]

Honestly, for young people on a budget and who like slim fitting, ultra-modern fashions...I have bought several suits at H&M. I own some bespoke (made from scratch from my measurements) cashmere/wool suits but I wear these even less often than my H&M suits because it's cheap enough to buy a new style every now and then. It's disposable clothing at the core and I know the whole ethical argument against that...but I find a lot more value and utility in that. I even bought a Tuxedo there (including fancy shirt and bow tie) when I had to attend the one formal event that comes up every 5 years and people can't tell the difference. Cheaper than a rental and way more fashionable, modern, and slim fitting than the horrible rentals that make you look like you are going to a red-neck wedding.

That will at least give you 2-3 options so you aren't wearing the same thing every freaking game day. It's also cheap enough so that you can experiment to see what you like.

I remember my first real suit purchase was for my high school grad and that was a colossal failure and expense. If your body fits off the rack, go off the rack and it will save you a ton and give you a lot more choice.