We have an empty 10 gal. He doesn't want anymore tanks set up, and doesn't want to get stuck with up to 250 baby bettas. Despite that there will be culls, deaths (because this would be my first breeding), and I will be selling all but one of them.
We were going to use the 2.5 for the moment, once the fry were free swimming, we were going to move them to the 30gal with our guppies and their fry. so, I think it'd only be up maybe 2 weeks tops. And that's IF they even breed. We've had Jade about a year now, and she was fully grown when we bought her.