I run 2 vans but have just removed the tank out of one and using trolley, this is so we can utilise the vehicle for other things, went out with my employee yesterday and I was just as quick with the trolley, a really good tip tho is to get a 100 metre hose reel that links to the trolley, this is for the odd jobs where access is limited or you have to ladder over a gate to get round.
Graham