As in everything, it depends on you and your desired level of participation.
Would you be happy in Club Ford? If so - and you don't wreck - it would DAMNED cheap to go racing, relatively speaking. Fuel, probably one or two sets of tires all season, haul it on a small open trailer behind a lightweight mid-sized pickup, rarely wears of break anything, and anything that does is not too expensive.
Wreck, though, and parts can be a pain to find.
Gotta go National Racing with the pointy-end of the field? VERY expensive engines, many sticky tires, lots of track time to learn to drive that thing at 10/10ths.
I drove a CF for a short while in the 80's, decided I liked door slammers better. But, I know CF can be done on a budget...
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