hello. do u know where better to invest money? which enterprise better to run?

You can invest money into different enterprise. For example, producing solar panels, packing industry or printers. But after you need to buy equipment for automatic work like encoders. I usually buy equipment in this industrial supplier https://eltra-encoder.eu/catalog/absolute-rotary-encoder You can check it for getting more info.

I agree that rotary encoders are perfect tools