Hi Chris and nice to see you posting.
I don't know about this specific trolley and don't know if you are an experienced wfp window cleaner or not so I hope that I am not teaching granny to suck eggs.
I have used a backpack, a trolley, a trailer, a tank and reel from an estate car, a small van and a larger van.
I would say that unless you have a specific use for a trolley then a van is the way to go.
If the trolley is an add on then 35L is quite heavy if you have to lift it off the ground when carrying a full tank.
Best of luck finding answers.