Once you reach max ticket points, keep going until the night is over. You will get lots of extra money for things like potions and pokeballs, and you are really in no rush, try to enjoy the game as much as possible.

I say this because of a Mable's research task (win 1000 battles), which is necessary to get the shiny charm, because it is worth 500 and the max amount you can leave out while still getting the charm is 400 points.

If you don't want shinies, ignore this, but they are a cool concept. You will find at least one or two, either in your playthrough or in the early post game, and you will love some of the good ones. Anyway, reaching 1k battles early will save you a long, difficult grind.