Price is the biggest drawback of pressure washers with high GPM ratings. However, you get what you pay for in more efficient, effective cleaning. Another thing to consider is that higher GPM pressure washers can be more challenging to control. You could accidentally damage surfaces if you’re not used to pressure washing with a high GPM pressure washer. Finally, high GPM pressure washers require more maintenance than low GPM pressure washers. You must clean the filter more often and ensure the pump is properly lubricated. A high GPM pressure washer is good if you are willing to pay more for a pressure washer and are comfortable with more maintenance. But if you need more time to decide whether you’re ready for a high GPM pressure washer, it’s best to start with a low GPM pressure washer. Of course, you can always upgrade later.