Heres a driveway i recently cleaned & pressure washed for an existing client. It had not been done in eight years and had moss as well as a layer of dirt & grime.
I wanted to share this because I feel light/small power washing jobs are an extra way to make a quick decent buck in my experience. It looks easy but it is hard work.
Exercise a little common sense and the proper tools & techniques and you should be able to take on small jobs such as these. I started doing them simply because my clients asked me too.
This job took 3hrs to complete start to finish, payment was $200 cash. Tools used were my Dewalt 3000psi pressure washer set at about 2700psi for this job, 25 degree tips used.
My test clean areas: