Have you ever carried a 10 litre bucket of water and a 2 piece ladder on your back for 8 hours a day non stop.
Take my comment the way it was meant
, I am an old fella
We do carpets, window cleaning, pressure washing plus more, I would not opt for pressure washing as a less strenuous option. Certain aspects can cause injury, using turb all day and simply the stance can effect back / neck, I have had several youngsters who could not take it similar to using wfp.. looking up all the time.
As for the bucket / ladder, most of the time I am working so I haven't got time for leisure activities
Good luck with it, Mike