I would say do Sasuke because it's easier to make in less than a month and it's kid friendly since Halloween=kids. Sasuke has a pretty easy outfit as long as you don't want it to be perfect. Try get a loose long sleeve shirt and some black pants. Wrap a piece of blue fabric around you with a purple rope and you've got a simple sasuke cosplay! If you buy/commission the costume, I think there will be enough time for you to receive it. Good luck!