Quantity   Component name
1 × Raspberry Pi 400 or newer
1 × USB HID RFID reader, 13.56 MHz MIFARE Here's the one I used https://a.co/d/0bN2XUZ1
1 × Computer monitor
1 × USB mouse
1 × MIFARE Classic 1K cards One for every app or website you want to launch. Any 13.56 MHz card with a factory UID. Nothing gets written to the card, so blank cards are fine and you can reuse hotel keys and transit cards.
1 × USB keyboard (if not using a Pi 400 or 500)
1 × Micro SD card 32GB to 128GB recommended
1 × Sticker paper For making card labels, if you choose. I used https://a.co/d/0ds4iqxT