That's the system I purchased. Put another order in for 12 4" pots, caps and floraclips for the veg tent.This is what they are selling a 12 plant system for:
12 Plant FloraCap Irrigation Kit w/ 2 Gal Pots
12 Plants per 4'x4' - 2 Gallon PotPro w/ Bubbler/FloraCap Irrigation - 4'x4' - 4'x44'floraflex.com
Your change jar might be enough!
the PVC tubing and fittings all add up quickly. I'm sure I've spent at least $100 on that stuff.