Thinking about buying a new casitas. Only thing that's holding me back is the breaking system. I've watched videos on how to adjust them but none of them talked about adjusting a system like the casitas were there were only 4 breaks. What are the possible ways I could adjust this? Could I do 3 on and 1 off or 1 on and 3 off or does it have to be even as in all on or 2 on 2 off?

you can do whatever you want

Most often it is done in pairs, but that is not chiseled in stone.

You can only use 1 brake if you want.