I made a trolley when I first started out, lots of hose reel on it, controller etc.
I soon got fed up with refilling it and running out of water mid job. And humping the bloody thing about.
Since then I bought a backpack and stuck it on a lightweight cheap trolley with a very short hose.
Buy the main thing I did was to get rid of backpack jobs and not take any on with poor access or no parking. I certainly don't do through the house jobs.
Using a trolley is rubbish, they are heavy, they run out of water, I can't stand the things. I don't know how anyone can use them all day.