Dog sitting and walking is a great side hustle to start out with. There is next to no barrier to entry, and people almost always have their own leashes and toys for you to use, so there is no upfront cost! Of course there are some unpleasant things like picking up poop or being constantly vigilant so the dogs don't run away or start causing problems elsewhere. When I was a teenager I had a neighbor with an inside pug and 2 outdoor golden retrievers. They would pay me $100 a day to stay at their house on random weekends throughout the year. I would pack up some clothes and my laptop and I would work on homework, play video games, or watch Unus Annus on Youtube. My only job was to entertain the pug inside and to let the dogs out of there kennel periodically. It was the dream job and I made a bunch of money to eat their food and watch Youtube. Obviously this isn't typical and most dog sitters won't be doing that. But the big idea to take away here, is that people will pay tons of money for their pets. Have you ever taken care of dogs? What kinds of things would you do with them?