Engine forged with headwork - 3k 350bhp + turbo kit - 2k Standalone and mapping - 2.5k That's money gone already without LSD, clutch, good brakes, intercooler, fittings, good tyres, inlet exhaust and the rest. Adds up to more than people think. Like said above it's the little things that add it up. Then you need money to insure it, drive it, fix it. You would enjoy it a lot more of you did it over time, all part of the fun then.