I would love 2 more seasons, but the talk from the producers has been they don’t see this going further than how many seasons of BB there was. That would be 5 seasons. Although if memory serves BB’s final season was stretched over a longer period, and was 16 episodes. I just don’t see how they can bridge 4 years or so to BB, and wrap BCS in just 10 episodes. Either more than one season, or they extend the number of episodes.
Thing is, if there is a spin-off planned (maybe Gus?) they’d probably want to get moving before the actors age too much more. Been quite a few years since BB came out.