Ok, I am thinking he needs a place to start. Most people start here:
You can see lots of examples and can search by battery brand, type, controller, etc. When you find cars that are similar in performance to what you want, take note of the components used, research their cost and capabilities.
Then you will know a little something.
There are many paths to what you seek. Do you merely want to meet the target? Or do you want to build something cool? You mention 72v pack. I think you must have forgot a zero and meant 720v, yes?
In America we call this humor..