Beginner friendly: Easy to start

Starting a window cleaning side hustle is relatively easy for beginners with no special skills or background. There are plenty of online resources like YouTube tutorials and forums that offer guidance on techniques and equipment. The setup cost for basic supplies like squeegees, detergents, and a ladder can range from $100 to $300. With consistent effort and practice, most people can start earning a profit within 2 to 4 weeks. I'd rate it a 4 because the barrier to entry is low, and there is a demand for window cleaning services in both residential and commercial markets.