Do I have to buy 4 robots to do training?

[samsonli]

The instruction of the readme said it needs to connect to 4 robots and 3 cameras. Do I have to buy 4 robots to do the training? That seems crazy expensive.

can I do the training with just 1 robot hardware?

[samsonli]

Read the doc https://mobile-aloha.github.io/resources/mobile-aloha.pdf. It means 4 robot arms, not 4 robots right?

https://github.com/MarkFzp/mobile-aloha talks about "4 robots". That's why I am confused.