hmm, basically what we're doing already, except with a better starting car, so...
high mileage BMW E46 M3 - £6000
secondhand set of wheels and decent trackday tyres - £700
decent discs, brake pads and fluid - £500
Coilovers, antiroll bars and camber kits - £1000
Bucket seats and harnesses - £600
Exhaust and breathing mods - £800
BGW - £400
total £10,000. however that's a bit pricey, so what we'll be doing instead...
high mileage BMW E46 330ci - £1030
Brake discs, pads and fluid - £270
trackday tyres - £380
suspension - staying standard - £0
bucket seats - £200
total £1,880, lets roll