The whole set up cost me less than £200 (Amazon prices do fluctuate quite a bit, so this may differ at the time of purchase)

What youll need:

• Android tablet (I used an Amazon Fire Tablet) – Link
  
• Wireless CarPlay / Android Auto dongle –
  White: Link (Low stock)
  Black: Link (In stock)
  
• USB C to USB Adapter – Link

That’s all you need to get started! A few optional bits:

• A USB C extension cable (makes hiding wires much easier) – Link
  
• Strong magnetic mount – Link
  
• Matte screen protector to reduce reflections – Link
  
• An AUX lead if you don’t want / can’t do audio over bluetooth – Link