Can I buy a Nomadic Pi already made?
For the meantime there is no pre built option as Anthony is still busy travelling around the country.
But look on the positive side, to get a Nomadic Pi to call your own you will only be paying for parts! Not labour!
That said if you stick with the Raspberry Pi Model 3, the official Raspberry Pi touchscreen and the Adafruit Ultimate GPS hat. Everything should just work from the software side of things. You just need to focus on the assembly of the unit and fitting the unit in your car.