Whether to hire a professional or to buy a pressure washer and do it yourself largely depends on a few factors. If you have the experience, equipment, and time to take on the task of pressure washing your house, doing it yourself could save you money. However, if you don't have any experience with pressure washing or aren't comfortable operating the equipment, hiring a professional might be the better option. Pressure washing can be dangerous and cause injury to yourself or damage to your property if not done correctly. A professional pressure washing service will have the necessary training and experience to safely and effectively clean your house without causing damage. That being said, before making a decision, it's best to research local pressure washing services and compare their prices and services with the cost and effort of doing it yourself. Ultimately, the decision should be based on what will give you the best results and the greatest peace of mind. The best way to eliminate risk and injury is to hire a professional pressure washing company that knows how to do this type of work.