mine is at enhanched performance being finished and mapped,

2.1 zetec, forged pistons/rods p.e.c bearings, arp bolts, gt25 with thrust bearing (for now) mtx75 with lsd, 6 paddle clutch, plus a massive list of other parts injectors, fuel pump, swirl pot ect ect

on the plus side of 5k already, going gt28 and racing concept manifold next year thats another 2k!!

cheapest option for you is focus rs engine.