Power washing for rentals? good idea or not

Hello everyone, I have recently bought a 3800 psi power washer to clean the outside of my rentals that have vinyl siding. I am thinking about starting a side say (hobby) of power washing decks and other peoples homes around my area of (Capac, Brown city, Peck,) for weekend for, to help me achieve my goal of getting another rental within 8 months. What does everyone think about this? Does anyone have any points? Kinda off topic but would love if anyone has any advice