Hire a good trainer to come and critique your team clothing or do a display of “current styles” before you shop.
If none of the Team have a clue on Western, it is VERY EASY to get the wrong stuff. How the hat is shaped, colors, cut of pants and shirt cuffs can be a BIG DEAL in Western showing. You don’t want to be doing “old style” clothes and look like you just came from the farm.
Would be worth your Team money to hire in the trainer, get your eyes “trained” for tuning up your look at shows. Not sure exactly where you would look, there is always a local “expert” but how good they REALLY are can vary. State winners over National Winners, mean that usually the caliber of competition is higher. Look at what these folks have won THIS YEAR. How far do they travel, what kinds of classes do they show in and win, or their students win at? Such a trainer can also help you tune yourself up in Equitation style needed to win. Sees and corrects the little things to improve all of you.
Western riding, any type of class is is made of many parts, as is a Jumping class. You can’t just plop anyone in the saddle wearing Western clothes, and expect them to place or win. Showing is very stylized now, you as a rider need to know what to expect when you get pulled out of the line, or asked to do a pattern. Trainer can help you with this as a Team.
You also might contact the AQHA and get some recent issues of Quarter Horse Journal, look at the photos of winners. Some of the outfits are amazing, but by looking at many photos, you get a feel for what is currently stylish. Home made is fine if you can make a good finished product. Someone makes those outfits the winners wear! Maybe you could find some used clothing, but you have to know if it is current enough to work for you before purchase. Tack Sales are getting started around here. Many listed on-line in local horse forums, state-local magazines of horse clinics, advertising. Used is cheaper than new.
You want to present a confident, smooth appearance. Knowing that you have the ‘right outfit’ will aid you a lot. Know what is expected in your riding classes by having Trainer work with you, will help even more. One thing that will label you as a fake Western rider is a bad hat. Crinkled brim, flat brim in front and back, uneven on each side, tells a Western Judge that you are “just wearing the hat”. Same as any other way of dressing, one part done wrong, shows others in that “fashion choice clique” that you have no clue. Western hats are ON your head, boxed away or hung up. NEVER layed on a table, brim down. Sorry, but if you are REALLY western, watching a nice hat get mistreated is a sad thing to see.
Good luck with your Team.