You'll have a bit of control over what you choose for the motion sensor, motor, and jumper wires. You can pick up a pack of six SG90 motors from Amazon for a little under $12. A 10-pack of the HC ...

I had a similar project about a decade ago for a customer. Instead of using sim cards, it was RFID cards and it read via RS232 directly into the ML1100 (networked version of the one he used).