Make custom LED wiring

I know this is a simple build with LED’s, but I brought it up since if you buy a pre-made solution just like this, it can run $5-10 each.  This would keep the costs to under a buck potentially.  Only thing I might do differently, add in a resistor to the LED.

www.instructables.com/id/DIY-Wired-LEDs-RGB-LEDs/