That's a tight budget for 5 x PWM RGB Fans, you could forgo the RGB initially and Buy Phanteks Halos for them when you have spare cash for the RGB bling
RGB PWM is basically the most premium fan you could want, maybe you'll get lucky though, I would go for fewer, more high quality fans rather than many cheap ones, as those many cheap ones might be noisy as hell even with a voltage converter
However if you don't mind a long shipping wait you could try some AliExpress ones out
https://www.aliexpress.com/item/Coo...lgo_pvid=33105937-ddb4-4622-a234-4a01f5f84584
They might even be real CoolerMaster if you're lucky
so yeah I agree that it's best to check reviews. I bought non-RGB Corsair MLs just because they're one of the best you can buy.
I also got a very expensive BeQuiet fan which I thought was PWM but isn't, it's ludicrously loud and fast, the PWM option was 50 cents more expensive and I just assumed it was PWM for some reason, pretty annoying.
These ones are even cheaper, not sure how much I'd recommend them, but hey - that fits your description of 60-65 for 4 - 5 RGB PWM Fans, if you bought them - you should just buy one to test it out, sometimes you do get more than you pay for and get a good deal. Other times you get what you pay for or worse....
https://www.aliexpress.com/item/COO...lgo_pvid=33105937-ddb4-4622-a234-4a01f5f84584