So, you want to save your mush for something, but wolf party and gear just look so tempting, right? Well, with my method you should be able to save up that precious cash without going on a spending spree.
Explore a lot. Gather all of that mush. I suggest exploring in the jungle. Buy moves and (if you're premium) a team heal. Explore at least 80-100 moves at a time. I promise that if you're killing everything you come across (prey and enemies) and you sell items like toucan feathers, you'll get loads of mush.
Everytime you collectively get 1000 mush in hand, put it in your mush hole. This can also be done in increments of 500 if it's too tempting.
Keep doing this and make goals for yourself. I recommend goals like "at least 1000 mush a day" or "level up at least 1 territory a day" if you have goals, it will motivate you to keep exploring
This method also helps if you have a battle team. It makes it easier to kill enemies while getting less damage taken from battle. This probably wont work with weak wolves due to them being hurt constantly and not being able to kill enemies efficiently