Originally Posted by gaddafi

If the idea is to make money, then it's a gamble and if the spend is £20K, some considerable risk attached

If it's fun, that can be had for £5K and a much smaller downside.

Given what the OP has said about his financial circs, I'd say a £5K toy (that will be better than many £30K road cars on the track) is a sounder proposition at this time.