If you are in a financial place where you have to choose between buying yourself a Halloween costume and buying your two young daughters a Halloween costume, you'd be a fool to choose the former. It is parents' job to facilitate Halloween for their kids, and if you put your own Halloween experience above theirs, you shouldn't be a parent.
Once you're an adult, it's easy to stop prioritizing holidays that you used to care about so much as a kid. As a child, I planned my Halloween costume by July or August, giving my mom and grandma plenty of time to help sew it. These days, I either wear costumes I bought the year before or put together something mildly creative from my own clothes. Last weekend, I went to a Halloween party dressed as Elizabeth Holmes. I have already seen so many people dressed as Elizabeth Holmes, and Halloween hasn't even started yet! It's perfect for lazy blonde people who own a black turtleneck and don't want to buy yet another Halloween costume.
There's been a lot of discourse online recently about whether it's immature for adults to still celebrate Halloween into their 30s. I've seen a ton of tweets that say some version of this:
"34-year-old guys be like, "What is the move on Halloweekend?" Dude, it's time to start a family!"
Different 34-year-olds are in very different places in life. Some have been parents for 14 years, some are about to have their first baby, and others still live like they're 21. I don't think it's a crime for anyone, no matter their age, to want to celebrate holidays with friends and family. If a mom with 2 kids wants to go trick-or-treating with her kids on the 31st after going to a Halloween party with her friends the night before, I don't see anything wrong with that! I would question a parent who always chooses hanging out with their friends over spending time with their children, especially when the years of trick-or-treating go by so quickly. Also, and I say this as someone who goes to around 5 Halloween parties every single year, Halloween is for kids. Adults can celebrate and have fun, but if you prioritize that over your kids having fun, your priorities are out of whack.