Use it. Creatine is (cost) effective. You can find quality creatine in the simple powder form for ~ 500grams/$25. This should last you 2-3 months depending on how you use it. I’m not saying it’s the best supplement out there. I’d prefer to use Mag10, 4ad-ec, or Methoxy7 if I had to pick one. But with the cost of creatine there’s no reason to pick just one.
Since the major energy system at work is the adenosine tri-phosphate (ATP)/creatine phosphate (CP) energy system, this would be an optimal time to use it. You can pick up 500 grams for around $8 by doing a search on yahoo shopping for Value Nutrition + Creatine.