Technology is moving at such a fast rate that anything mediocre state of build/tune will be left lagging miles behind unless you are stinking rich and have a huge budget & skillset to build one of these monsters.
Money & technology go hand in hand and for majority i think it has ruined motorsport!
Even if you built a car to the best of your ability and budget it would never be fast enough or good enough to compete with any of the cars being built around the world today
Having said that these cars are impressive and you have to admire the skill and work involved in building them!
Bit like the UK Time Attack entry Pulsar