He'll let you pay 20 rupees to roll the snowball down a hill and try to take down as many pins as you can. Travel to Hebra Tower in the northwest corner of the map and head just a tiny bit down the road from its base to find a hut with an old man standing outside of it next to a snowball.
If you want a skill-based way to make some money, the snow bowling mini-game in the Hebra mountains is a good way to do it.
Zelda Breath of the Wild rupee farming hacks: Go out on the strip However, there are a few get rich quick schemes in the game. You really should be collecting as many of those as you can, as your inventory is unlimited. The first thing I'll tell you is that the rupee flow from selling enemy leftovers like moblin guts and horns can add up quickly at shops once you've collected a lot of them. Zelda Breath of the Wild rupee farming hacks: Sell monster parts Most of these tips come courtesy of Gosu Noob, with some coming from my personal experiences. However, there are a few easy ways to farm rupees fast and afford some of the tech lab's best gear in Zelda: Breath of the Wild. Instead, one of your best sources of income in Zelda: Breath of the Wild is picking up materials and selling them to vendors. Unlike previous Zelda games, you rarely find rupees out in the world. Not only does everything there require ancient machines parts, but it also all comes with a hefty rupee cost. There is a way to buy amazing gear in The Legend of Zelda: Breath of the Wild by visiting the Akkala Ancient Tech Lab, but there's a catch.