has any person really bought that 220 HP Cossie Duratec engine and dropped in into their focus?

probably not, but there are a few guys who've done stage 1-3.... After everything is said and done , the engine might only be "slightly" more expensive....
good luck
-bix

If I were to make a track-only Focus, donor ZX3 + Cossie would make an awfully strong car, and probably wouldn't break $10K...