The budget for this project was $500. In total approximately, $150 were spent on the following items:
https://www.mcmaster.com/6255K31/
https://www.mcmaster.com/9657K636/
https://www.mcmaster.com/9657K634/
https://www.mcmaster.com/6435K12/
https://www.mcmaster.com/9140T271/
https://www.mcmaster.com/9140T272/
https://www.mcmaster.com/93675A250/
EM2 Transmissive Optical Encoder from US Digital (P/N: EM2-0-1000-I)
THKR26 Actuator transmission https://catalog.orientalmotor.com/item/linear-actuators-linear-slides-only/thk-lm-guide-actuator-kr26/kr2602a-0060-0-01a0