Having a DIY mentality is usually a very positive thing, since there is a pretty good chance that many of the tasks that you might have hired professional experts for are actually surprisingly easy to accomplish yourself if you do a little bit of research. That said, you should be wary of letting this mindset go too far. Some tasks are incredibly technical, even if you don’t realize that at first glance. We can’t tell you just how many people have gotten frustrated when they tried to pressure wash a surface because they made silly mistakes that experts would have preempted prior to initiating the cleaning process.
There are some rather basic types of pressure cleaning that you can do without any third party assistance, but the truth of the situation is that if you want the best pressure washing results possible you need to be willing to work with someone so that they can give you the guidance you will inevitably end up needing. This is because of the fact that power washing can often include complex calculations such as figuring out what PSI you should be using as well as what nozzle you should add to the hose to compress the water into a jet or spread it out into a spray.
Learning all of these things yourself will take months at the very least, and the fact of the matter is that you can pay a small fee to have a professional who already knows the right techniques thereby saving yourself a lot of time. Unless you are willing to truly dive deep into pressure washing, we would humbly suggest that you leave it to the pros.