motorized camera slider - cheap and simple

BOM:
- 3pcs 3d printed parts
- any nema 17 stepper motor
- 2psc FL05 flange bearing (model included just for representation - not printing!)
- 2pcs gt2 pulley and 2m belt (can be bought as a set)
- 4pcs 12mm polished stainless steel rods (full - heavy / hollow - more expensive) OR 12mm chrome plated linear motion shaft (extra mega brutal expensive...)
- 4pcs linear bearing lm12uu
- 4 pcs zip ties
- camera ball head according to your liking
- electronics: any arduino, 2 axis joystick,