i bought my car for £8000 a 2wd saff v clean 450 bhp with 500 miles on new nms engine will hopefully be 480 once run in and live mapped. coilovers, big brakes, secs and defi link and even a spark plug in the exhaust
i could never build my car for anywhere near that amount.
just a quick example from my reciepts, for everything brand new t4 turbo, gearbox rebuild, new block with all gaskets seals bearings pistons with machining, wrc hgasket, and intercooler, oil cooler, larger rad and turbo pre cooler just that is £4600 ! and theres no labour in that and thats just the begining youve got a head rebuild, porting, injectors, air to air, water injection its never ending would cost a fortune and youl never get it back.
im on my fifth cossie now in 5 years and ive done about 15000 miles between them and after part xing my last saph to north yorks rs spares as shed broke her back i was roughly £1000 down and that includes repairs and tuning but not tyres and fuel. just my two pennence worth. good luck with whatever you do mate