Like anything we do in life that's in the "fun catagory" we have to consider the budget and justify to ourselves only (not wives etc) thats its a good deal.......
Having run in the open wheel catoagory of Formula First (FST) for 3 seasons I can share that the tire cost by comparisen to other open wheel classes is significantly lower because of the spec Hoosier provided us and the rules which were designed to keep costs to a minimum. I hope others will chime in on this subject to support my vote for FST as the ideal entry to open wheel racing.
Steve