That's a really good bug that you found! It's true that you can run out of both beans and money and there's currently no way to refill them. I hadn't thought of that, since with "normal" gameplay there's way more beans than you can use up.
After the feedback I've had for the game, if I decide to revisit it in the future, I would probably remove the timer altogether since it clash with the slower mechanics of planting and mixing beans.
Thank you for playing, reporting the bug and the nice comment ☺️